Counter strike 2, released recently and runs on Linux, I can't say that the people you'll meet on that will be that great all the time, but you may be able to meet people there.
You might also be able to meet people in RuneScape or old school RuneScape, or other MMO type games, usually they have clan features where you can join a group of players.
Not sure if it's still busy with players but kingdom of loathing also at least used to have players you could chat with live, and could join a clan or something like that in there.
Agree, also confused because Debian seemed to get security updates rather frequently when I've used it.
That's like their whole thing, stable and security updates. I would be curious if there are examples of exploits that weren't patched quickly on Debian stable.