Update: April 24
Chris Wylie, the "gay vegan" software genius (there are others -- he reminds me of Danganronpa in Reid Ewing's world) who blew the whistle, will testify before Congress soon and offers this advice on how to fix Facebook.
Further: April 24
Facebook has released its objectionable content policy, here. Look at the "hard questions" regarding meta-speech under the hate speech area.
Chris Farivar of Ars Technica remarks that Facebook is finally "telling its users what's allowed".