What's the liability involved in participation in such data collectives as hosts? From running a Tor exit node to un/wittingly seeding leaked restricted docs, s

What's the liability involved in participation in such data collectives as hosts? From running a Tor exit node to un/wittingly seeding leaked restricted docs, someone who believes in digital freedom of speech and open access to information can unknowingly poke a beehive by trying to do their part. What are the latest books, communities, or cross-jurisdictional resources that pragmatically outline the risks involved for individuals running a computer servers hosting other peoples' stuff? The EFF comes to mind, but I know they're a small team and there might be a more focused group.