This is some interesting information about Facebook censorship - both what they censor and how they do it.

Third World sweatshop censors

FB's so-called abuse standards

The most sinister part of that list is their censorship of all mention of Abdullah Öcalan, the Nelson Mandela of Kurdistan in Turkey, who is serving a life sentence in solitary confinement as the only prisoner on a special prison island near Istanbul, and it seems being slowly poisoned - unless, that is, you simply repeat what the Turkish state says about him. Nor are you allowed to link to a map of Kurdistan like this one, this one, or this one. It looks like if you tried putting up a message on FB linking to this interview with Öcalan or even for this message right here, Facebook would find out about it and delete your post.