I was just thinking about a solution for this. What if two users share files A and B, where both A and B look like noise, but when XOR-ed, they form the copyrighted work? Both users can claim plausible deniability. Especially if A XOR-ed with another file C results in a copyright-free work (and similarly for B and another file D).
I've been seeding libgen torrents for quite a while from home without problem while many I know get desist letters from their ISP for downloading a single Disney movie.
