this post was submitted on 23 Jul 2026
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You Should Know

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[–] ExtremeDullard@piefed.social 99 points 3 weeks ago (1 children)

Hey! I'm in that list and I have no clue what any of this is about 🙂

What the hell is Tesseract?

[–] guynamedzero@piefed.zeromedia.vip 57 points 3 weeks ago (1 children)

It’s really just a custom ui/frontend that admins can run for their lemmy/(piefed too?) instances.

[–] ExtremeDullard@piefed.social 73 points 3 weeks ago (14 children)

Well, I quickly read through that list and I'll say this: considering the insane amount of stuff that gets silently filtered out, whoever views Lemmy through that thing must think it's pretty quiet 🙂

[–] Carl@anarchist.nexus 85 points 3 weeks ago (2 children)

And that’s a large part of the issue. The frontend doesn’t actually disclose this blocklist at all. In fact, it actively takes steps to obfuscate things and make it appear as if the blocklist doesn’t exist at all.

For example, attempting to view a blocked instance shows a generic network error, rather than a “this instance is being blocked by your frontend” error. And blocked users aren’t simply flagged and/or collapsed. They’re entirely hidden, as if they don’t exist at all. So someone using this as their primary frontend wouldn’t even know that they’re missing entire posts and/or comment chains, because anything from the blocked users is simply gone.

Additionally, the blocklist is downloaded (in plaintext, over http) when the frontend is booted, so it’s not a file that gets updated with the git version updates. Meaning the dev can silently update it even if users haven’t pulled new versions. Simply rebooting your frontend would be enough to pull an updated blocklist. This gives the dev an extreme amount of censorship power, because they can effectively change users’ configs without any action on the users’ part.

It was only originally discovered because the admin for db0 used the frontend. And notably, db0 is on the block list. They were previously using an old version of the frontend that didn’t include the hidden blocklist yet. They updated their Lemmy stack a little while ago, and suddenly their entire frontend was broken (the entire feed was completely empty) and showing a generic version incompatibility error.

After lots of troubleshooting, the db0 admin eventually discovered that the frontend was downloading a hidden blocklist and automatically blocking the instance that it was running on. Because when they updated their stack, the new version of Tesseract included the secret blocklist. So it downloaded the blocklist when it booted up, found that db0 was on the list, and silently hid every single post because they were all from a blocked instance. This resulted in a completely empty feed.

[–] halcyoncmdr@piefed.social 22 points 3 weeks ago (1 children)

Considering the amount of effort put into the blocklist by the Tesseract dev to keep it hidden, you would think they would have included an exception if it was running on a blocked instance to help keep it hidden.

[–] 4am@lemmy.zip 14 points 3 weeks ago

Don’t give them ideas, it’ll be harder to find the next one.

I guess the lesson here is “compile from the source repo and code review before you install a new frontend”

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[–] Apeman42@lemmy.world 71 points 3 weeks ago (1 children)

Wow, this dev must be an absolute chud, in which case I'm honored to have triggered them so. Tongue punch my fartbox, loser.

[–] PattyMcB@lemmy.world 15 points 3 weeks ago

Tongue-punch my fartbox is my new favorite saying

[–] cheeseburger@lemmy.ca 52 points 3 weeks ago (5 children)

There's a user regex section for people across multiple instances, so:

"^cheeseburger$",

I guess that means all my accounts are covered 😄, but why? Who the fuck am I to this fool? What an absolute clown.

[–] kate@lemmy.uhhoh.com 28 points 3 weeks ago (1 children)

“Kate” is also on the list 🫣 am i the only kate on lemmy? i don’t know of any others but i guess we’re all in this together if so

[–] vaionko@sopuli.xyz 14 points 3 weeks ago

They really don't want people to hear about the best text editor

[–] naught101@lemmy.world 13 points 3 weeks ago

Maybe he just doesn't like cheeseburgers

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[–] 4am@lemmy.zip 51 points 3 weeks ago
[–] Wren@lemmy.today 47 points 3 weeks ago* (last edited 3 weeks ago) (3 children)

I post leftist, feminist, gay shit all the time and didn't get blocked. They just shadowbanned my news coms. This is outrageous.

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[–] audaxdreik@pawb.social 38 points 3 weeks ago (7 children)

I just want Lemmy to have a better, more wholesome, and welcoming experience for new users, as such I've decided to block the things I think we can all agree are bad:

  • Calls for violence
  • Politics
  • Sex
  • Nu metal
  • People who put egg in potato salad
  • Jerry (all of them)
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[–] wiccan2@thelemmy.club 31 points 3 weeks ago (6 children)

I'm on the list, this account is only 3 months old, no posts, 41 comments.

Who and how the fuck did I piss off, lol

[–] VitoRobles@lemmy.today 22 points 3 weeks ago (5 children)
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[–] AbsolutelyNotAVelociraptor@piefed.social 27 points 3 weeks ago (2 children)

I suppose this means the guy in question prefers velociraptors over people, otherwise I can't explain why am I on the list.

[–] hitstun@feddit.online 25 points 3 weeks ago* (last edited 3 weeks ago)

"^hierophante",
"^HistoryLOL",
"^hitstun$",
"^holyclergy$",
"^HomeInvasion$",
Oh, so that's why I can't find my own posts in Tesseract. I'm surprised they didn't block my whole community.

[–] BigPotato@lemmy.world 24 points 3 weeks ago (1 children)

Feeling offended now, going back through my comment history and thinking "Why did that not get me on there?" Am I too tame?

It's probably because I spend 60% of my time on here overthinking and eventually deleting my posts before posting them...

And 30% writing the posts that never get posted.

[–] ZombiFrancis@sh.itjust.works 20 points 3 weeks ago (4 children)

Yeah you'd be overthinking it since the dev wasn't doing much themselves. The blacklist was not put together coherently and appears to be mostly built by emotion, especially in light of the dev's "I'm not sorry at all" response.

The dev is a part of a corporate structure they formed where they're named CFO. They are, in their mind, Fediverse C-suite, and they act accordingly.

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[–] PattyMcB@lemmy.world 23 points 3 weeks ago
[–] TheStaffmaster@lemmy.world 21 points 3 weeks ago* (last edited 3 weeks ago)

Found myself. What's this all about then?

OOOOHHHHH, so this is about Leftist cred. I see. ;) I guess this proves I'm not a misogynist, like the Admins on 196 seem to think.

[–] susi7802@sopuli.xyz 20 points 3 weeks ago (8 children)

YSK I have a personal black list of users that I never will see again. If you can still see this message you’re fine.

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[–] Derpenheim@lemmy.zip 19 points 3 weeks ago

Im gonna be honest, I have no idea what the fuck is going on but I guess Im on there.

[–] Randelung@lemmy.world 18 points 3 weeks ago (2 children)

Shit, I gotta dial up the woke more.

Human rights for everyone, I guess? Will that do it?

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[–] Wren@lemmy.today 17 points 3 weeks ago* (last edited 3 weeks ago) (5 children)

The Admiral posted this to his com: https://lemmy.today/post/57096701

Pinned and locked it, too. Apparently nothing was blocked, you only need to enable "toxic mode" to see the banned content.

[–] anarchiddy@lemmy.dbzer0.com 28 points 3 weeks ago (2 children)

“Who are you to decide…?”, “What gives you the right to…?”

A: Well, somebody’s fucking got to.

That's the job of the fucking instance admins, you dimwitted moron.

What a self-aggrandizing piece of shit. He should have left when he said he was going to a year ago.

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[–] volore@scribe.disroot.org 24 points 3 weeks ago* (last edited 3 weeks ago) (2 children)

What a self-important moron. "I must be the arbiter of what is good and proper and what goes too far! someone has to!" yeah they call it curating your own fucking block list you fuckwit, doesn't mean you should be silently "curating" anyone else's. "But think of the poor normies who are lazy!" then they can go back to reddit. Lemmy will grow, and has been growing, just fine without your "help". "If you don't like it, don't use it!" Aha, finally, something I think the entire fediverse (save for his own little fiefdom) will be likely to agree on.

That entire post is indicative of someone too stupid to read the room and too stubborn to leave it.

[–] TrickDacy@lemmy.world 22 points 3 weeks ago* (last edited 3 weeks ago)

I also enjoy that he basically says he's working on blocking all the dregs of society who cannot exist anywhere else online, as if to imply bans from platforms like reddit are typically just, and he also conveniently ignores that he likely was banned from Reddit in the first place, unless he left because he didn't like the same shitty culture that leads to banning people with non-fascist viewpoints.

He's obsessed with this idea of bringing "normal" people here and shielding them from anyone with an opinion about anything that fucking matters. Fuck that. I don't want the same people who have no issues with ice or trump in this space, nor do I want their supporters here. Let those assholes stay on reddit. He's acting like he's politically neutral in this way but from what I can tell that's definitely not the case just due to the vast majority of users here being on the left, if nothing else.

He's literally sought to neuter what is actually good about the fediverse. By silencing the people who are not okay with the world as it is...

And you know he gets a smug look on his face every time he adds a "toxic" item to his little blocklist. What a douchebag.

[–] Wren@lemmy.today 18 points 3 weeks ago (1 children)

Not only that but he goes out of his way to imply you'll be dragged into the troll pits if you disable the filter. Considering who's on that block list, his skin must be tissue-thin.

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[–] Maeve@kbin.earth 22 points 3 weeks ago (1 children)

To disable them (referred to as enabling Toxic Mode in the settings), it’s as simple as:

Settings -> Advanced -> Click the "I feel like some content is missing. What's up?" text at the bottom -> Enable Toxic Mode

I didn’t want to add that option, but I conceded nonetheless, and it’s been available the whole fucking time. I’ll admit the fine print buried at the bottom of the advanced settings isn’t the most upfront place to put it, but it is there, and there’s nothing stopping you from turning it on.¹

¹ Admins who deploy Tesseract can opt to disable the availability of toxic mode, but it is available by default.

It even flat out says why that exists:

Tesseract attempts to filter out as much baseline toxicity as possible in order to make the default experience welcoming and round off some of the Fediverse’s rougher edges. This is particularly important for attracting and retaining new users and for facilitating long-term growth of the platform. If you absolutely must, you can enable ‘Toxic

When non-toxic becomes toxic. ~~I don't object to the idea~~ These include very vanilla users, left, right, center. What is this person's criteria for "toxic?" but yumpin yimminy the wording...

[–] Wren@lemmy.today 22 points 3 weeks ago

It's bullshit, I know. The block list even included my tiny 115 subscriber community for independent canadian news. He must have had to dig to find it and then find something wrong with it.

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[–] gamermanh@lemmy.dbzer0.com 15 points 3 weeks ago

I haven't even used this site in a year. Dudes butthurt at lefties and it's so cute

[–] teslekova@sh.itjust.works 14 points 3 weeks ago (1 children)

Made it! Awesome. I'm on a crazy man's radar.

[–] cRazi_man@europe.pub 13 points 3 weeks ago* (last edited 3 weeks ago)

I'll keep you on my radar babe.

I'm on the VIP list too 😆

[–] Murse@slrpnk.net 13 points 3 weeks ago (2 children)

I did it! 🎉

Idk wtf tesseract is... is this like Lemmy's version of being banned from r/conservative?

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[–] mangobanana@discuss.online 13 points 3 weeks ago (1 children)

How the hell am I on this list? I barely post it comment on anything.

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[–] Kushan@lemmy.world 12 points 3 weeks ago (3 children)

I am not on the list! I'm actually rather annoyed.

Whose girlcock do I gotta suck to get put on the cool list?

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[–] volore@scribe.disroot.org 12 points 3 weeks ago

delighted to see that a username I used to go by on a couple instances has a regex entry, somewhat disappointed this username isn't in there. Clearly I need to step up my game on this account.

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