> I'll be seeding a file to others who might have legal alternatives

It doesn't seem fair to me to make the seeder responsible for the illegal usage of the leacher. If it's legal for some people to connect to a torrent, then any crime committed by someone who connects and downloads something they are not allowed to download should be on them, not on the seeder. The alternative is to insist that the seeder is responsible for checking that each of their peers have the rights to the content, which is impractical.