I wrote a very slow, good citizen DHT scraper the other day to do some research and the second I spun it up on a Hetzner box I got an email from them that summarized as "For real, bro? Computer says no."
They actually look into the stuff you put on the computer? That's even worse than I thought. I did get a strong feeling of distrust towards their customers when I tried to sign up but because of that I never went ahead with the deal. Dodged a bullet, clearly.
They just look at the traffic coming and going. I have a bunch of Hetzner boxes for different web projects that I've had forever and never heard a peep from them.
DHT is the protocol for P2P BitTorrent metadata transfer, essentially. It sorta lets you bootstrap a BitTorrent download without having a centralized tracker site. I'm trying to find a list of torrents for a research project and I need to monitor a lot of DHT traffic to see what is out there.