Serious question for those who have had content stolen and posted on tube and torrent sites. These sites dominate the search results. Just search any major porn site and half the results will be torrent/tube sites giving away everything for free. If you own one of these sites, you should be going after Google. They'll remove a lot of those pages.
http://www.google.com/dmca.html
It's not the same as taking it down, but it does help make it harder to find for the average surfer.