There is a big difference between file sharing sites that are making money off file sharing services used primarily to share copyrighted materials
and other file sharing sites like box.com, Dropbox, Skyfile.co, DropIr and SugarSync. There is a place for file sharing sites and Affilate programs seem to be the key
indicator of a legitimate business site or a pirate haven.
All these legitimate file sharing sites have a good system for dealing with copyright content that ends up on their sites, the pirate sites do not take it down because they are making money off it. So we don't need SOPA or PIPA they system works today, pirating sites are taken down seems like every week.