>But more importantly there's a big difference between how Facebook and Twitter work - Facebook is default closed, people can't interact with you unless you're

>But more importantly there's a big difference between how Facebook and Twitter work - Facebook is default closed, people can't interact with you unless you're putting yourself out there - either by friending people or joining a group, so there's a natural barrier against the spread of harassment, brigading and the toxic behaviour becoming public. There is a whole load of toxic neo-nazi stuff on Facebook, but it's out of view, and because ads are highly targetted there's no concern about brand safety. On Twitter it's default open, so if people are going around loudly spreading far right homophobic conspiracy theories about a violent attack on an elected official everyone is going to know about it - that's why Twitter has to be so careful. Interesting point! I'm not totally convinced though, I'd expect there are a lot of neo-nazis on Facebook who make their posts publicly viewable. "Hey look guys, there's this terrible neo-nazi post!" -> some FB users see an ad for their fav brand above the post.