This is quite rich. From peer-to-peer networks to uploading sites, those posting copyrighted works love anonymity. Would they be as willing to infringe copyright if they knew the site they were posting to would turn over their identities?
Oh, and in case you have no sympathy for Tolkien's heirs and don't believe he should have been able to pass down his intellectual property the way one might pass down a flower shop or a family farm, please read the comments in my previous eSnips post (at this point we're at 23 comments and counting). That field is full of published authors trying to make an honest living off of their hard work and creativity. They are the real victims of sites like this.