All the messages from Facebook seem pretty clear that it's the nudity in the image that's the problem. Have you seen something else from Facebook claiming it's the violence?

EDIT: Here's the orignal post, which contains an image from Facebook. http://www.aftenposten.no/meninger/kommentar/Dear-Mark-I-am-...

That image says:

> We place limitations on the display of nudity to limit the exposure of the different people using our platform to sensitive content. Any photographs of people displaying fully nude genitalia or buttocks, or fully nude female breasts, will be removed. Photos of women actively engaging in breast feeding or exposing reconstructed nipples for awareness are allowed. We also make allowances for digitally produced content for educational, humorous, or satirical purposes, and for photographs of real world art. We understand that these limitations will sometimes affect content shared for legitimate reasons, including awareness campaigns or artistic projects, and we apologize for the inconvenience.

> Therefore I ask you to remove or pixelize this picture.

That's pretty clearly about the nudity.

Nudity is far easier to be identified algorithmically than violence.