I pretty much copy and pasted this post of mine from earlier. It talks about known deleted scenes and reasons (or educated guesses) as to why they were removed. Someone recently mentioned Dawson/Trey, and I think there was one other Costa Rica one that was removed (one of the Brody/Cain ones?) I'm going off memory here.
-Controlling Dawson (Tom fucks Dawson) (reason unknown)
-much of Logan's scenes (requested by family after he was murdered)
-Clay's scenes (pulled after his shooting spree and suicide)
-Jamie fucks Josh (reason unknown)
-much of the real early stuff (reason unknown, although likely due to inferior camerawork/quality)
-numerous soloists over the years (reasons unknown, although probably requested by respective models)
-Blake's entire library (reason unknown, online rumor says that he is married to Corbin himself)
At one point in the late 2000's, all of Marcus' and Lucas' scenes were pulled and later put back up. Corbin said it was in Lucas' contract that his scenes be up for a certain time period, but the fans revolted and they were put back up. Marcus I believe, got into professional dancing and modeling and stuff and requested his scenes be removed.
I should also note that Marcus fucks Logan is the only scene in CF history to be removed twice, first because of Marcus, then because of Logan.
If anyone knows of any other deleted scenes, please list them here. Thank you.
Oh, I should also mention all of Pete's Attic podcasts were removed. I'm thinking that was for different reasons: 1) Some of the info revealed in the things could lead to models personal info being exposed and 2) they weren't really what the site was about and 3) it was probably just a pet project for Pete, who has since been fired from the site.