I feel that this kind of criticism is out of place, since Facebook has been working this way (successfully) for almost a decade without anything like that happening on a great scale.

Yes, mistakes can happen and they do happen everywhere, but Facebooks standards seem quite reasonable to me and they must be, since such mistakes would not be tolerated by its users.

Anyways, I doubt that Facebook ever encouraged its users to upload nude pictures. Whoever does this must be out of his/her mind.