On the recent page at this moment (
http://thepiratebay.org/recent) , 90% of the torrents are of copyrighted content not being distributed by the rights holders. Two of the legal ones, I believe, are the porn picture sets. They are used to promote pay porn content and I will give the uploader the benefit of the doubt here. The other one is someone's collection of recipe for Indian food. I'm similarly assuming that his collection of recipes is not copyrighted, but 15.9MB of recipes is a lot of personal recipes.
Look: I am not in favor of the current system of IP. I think it is ridiculous to artificially add some constraint of scarcity when the marginal cost of duplication has fallen to zero. But we're reasonable here, we're not in court. We don't need to defend TPB using legalistic arguments. We can just be happy that a group of high powered lawyers turned out to be completely incompetent.