Technology

According to your link, hosting an exit node was not a crime by itself, this person pretty much encouraged the illegal activity

The Austrian Court found that this activity may lead to criminal liability for aiding and abetting of a crime of distribution of child pornography when coupled with other circumstances. Of course, mere provision of Tor Nodes would not be enough to establish at least indirect intent (bedingte Vorsatz), which such aiding and abetting under criminal laws usually requires (§ 5 StGB).
In order to find such circumstances, according to PCWorld, the court cited transcripts of chat sessions uncovered during the investigation in which the Weber told an unidentified correspondent “You can host 20TB child porn with us on some encrypted hdds”, “You can host child porn on our servers” and “If you want to host child porn … I would use Tor.” Weber defended himself against this on his blog saying: “Yes, this logs existed – Yes, i recommended Tor to host anything anonymously, including child pornography – Yes, this is of course taken out of context.”

You can also run a obfs4 bridge, it's an unlisted relay that only serves as entry node. If greatly helps out users in censored countries.

I was talking about middle/guard relays. The guide also refers to middle/guard nodes. I wouldn't run an exit on my home internet connection either. I use VPS providers for exit nodes.

You have my sword!

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What data? Tor is designed in a way you don't have any useable data if you don't control a significant portion of the network. And even if they could control it, how much is that data worth anyways? ISPs don't get rich selling traffic data afaik. Blackmail maybe?