Resurrecting a dead torrent tracker and finding 3M peers

> Is this legal?

Why wouldn't it be? You're not actually hosting a tracker in this case, only looking at incoming connections. And even if you do run a tracker, hard to make the case that the tracker itself is illega. Hosting something like opentrackr is like hosting a search engine, how they respond to legal takedown requests is where the crux is at, and whatever infra sits around the tracker, so police and courts can see/assume the intent. But trackers are pretty stupid coordination server software, would be crazy if they became illegal.

Is this legal isn’t a useful question. The better question is how likely are you to get sued? With civil lawsuits it doesn’t matter if it’s legal you can be sued and harassed by lawyers if you get on their radar.

This is definitely the right pragmatic take. A lawyer friend of mine once laid it out for me: "in litigation, if you go to court, even if you win, you lose". The reality is that court sucks, and getting sued sucks for all but the ultra-wealthy (who can absorb the cost). For those of us with less than $100MM, court is a universe to be avoided.