User generated content is as likely to contain copyrighted material as it is to contain spam. The difficulty in policing it is perhaps best illustrated by the sites owned by the big 6 themselves. Of all the sites on the internet, few have more to gain (or lose) than the titans of media, CBS, NBCUniversal, News Corp (Fox), Walt Disney, Time Warner. These companies are the most vocal supporters of legislation like SOPA and PIPA to censor the web, so one might expect their sites to be pristine, free of all links to pirated material, especially links to sites that are well known havens for piracy, like ThePirateBay, Megaupload or RapidShare. Wrong! It took just seconds to find these links on their sites.
