another random user sends this excerpt from the BBC:
"Two film studios have asked Google to take down links to messages sent by them requesting the removal of links connected to film piracy. Google receives 20 million 'takedown' requests, officially known as DMCA (Digital Millennium Copyright Act) notices, every month. They are all published online. Recent submissions by Fox and Universal Studios include requests for the removal of previous takedown notices. ... By making the notices available, Google is unintentionally highlighting the location of allegedly pirated material, say some experts. 'It would only take one skilled coder to index the URLs from the DMCA notices in order to create one of the largest pirate search engines available,' wrote Torrent Freak editor Ernesto Van Der Sar on the site."