Honest question: how would you reconcile privacy-centric communities like Reddit and definitely-not-privacy-centric communities like Facebook? They both have the same patterns of information bubbles generally feed content in similar ways (broadly speaking) and they both have strong troll subgroups. If anything, Facebook might have a lower overall incidence of trolling because you run the risk of having your profile picture on the evening news.
it's not about quantity of trolls, it's about the effect of trolls. No one cares if you're a troll on reddit, because there's no personal investment. You're just an account. There's an upper bound on the damage that can be inflicted on you. That is not the case with Facebook. Reddit doesn't have to do anything about trolls except give people a downvote button.
Does Facebook actually have less trolling? I don't know how anyone could quantify it but subjectively there seems to be a lot. It's easy to create fake accounts, and some people just don't care.
In an absolute sense I imagine they probably have more, given that they have something like 1.5 billion users. I think the type of trolling might be more mild in general though, back when I used it regularly it was mostly just 20 page political debates hinging on gross misunderstandings by both parties...
Criminal street gang members threatening and dissing each other doesn't qualify as trolling. If we're calling that trolling now then the term has lost all meaning. And that retiring US Attorney didn't cite any evidence of one social media system being worse than the others.
"Troll: One who posts a deliberately provocative message to a newsgroup or message board with the intention of causing maximum disruption and argument."
There's been an absolute epidemic within this thread of people attempting to redefine trolling in such a way as to minimise either the problem or the source article. It's beyond stupid, beyond credible, and beyond sustaining any credibility of those doing it.
Reddit's attempting to bridge this gap already by addin a Facebook-like profile where you can build an identity or following based on your screen name.