Now, as before, no-one wants to see how the sausage gets made. Especially those selling it.
Can't kill demand or bear the visceral truth. So instead we'll pretend the seedy underbelly doesn't exist. Paper over dissonance with ethical codes and platitudes.
Not new. Just a context shift in production of sustenance for the collective, insatiable gaping maw.
I also believe this is one of the reasons where Facebook's real name policy comes in - it discourages people from posting the worst of it. Animal brutality could just be kids fooling around on their phone, accidental, but produced child pornography is not, and the people making that shit know really well how they shouldn't put it on sites that require them to use their real names.
Facebook is really broad, so are also online news magazines which are sometimes full of horrible comments (only text of course). Usenet more or less ceased to exist because of that. So in reality this is not a Facebook problem but an online community problem - it just looks like a FB problem because that's the major online community.
I wonder if this could be solved with a 3rd party Facebook integration/startup :-). Anyway, Facebook also has more problems with that, another one being undesired unsolicited contacts which fall into the same category of not so nice stuff about Facebook. People don't see the meat production but the bad smell is really close which is why many leave.