I don't get why this is such an issue. I understand the sheer numbers of people that use fb and get their 'news' from it, but it amazes me that people are shocked that fb censors the content. Facebook never claimed to be a news organization nor part of the 5th estate (which, pretty much doesn't exist). So that being the case, I would never expect fb to be a partner for democracy. Just because some recent revolutions…
No one is surprised a private company censors content, it's the cultural homogenisation on a global service that can grate, even though it's no surprise. A global service that tries very hard to be the global platform for everything, including news publication (that may have been unsuccessful). No surprise after many years of this most people's networks are on Facebook.
No doubt to an American some of the things I, as a Brit, think and do will be plain weird yet Brits are quite close compared to some nations. For all us outsiders, FB (and other US sites) and US attitudes to nudity and violence are, well, interesting. Usually just amusing, sometimes it can be annoying like in the case of this globally famous photo. Don't forget none of us foreigners have a first amendment or rights under it - so that's not even relevant to us.
It wouldn't be that hard to have regional appropriate guidelines for censorship, acceptable behaviour and what have you. Then Americans could have American mores, Norwegians theirs, and we can be confused, amused or fascinated when something goes viral enough to overlap.
I'd like to preserve more of the global differences - it's what makes the world interesting. We might find others do some things better.