Isn't the doxxing the problem then? It seems like the focus is in the wrong place.
Don't we already have laws on the books to stop harrassement? Don't we have laws to stop from inciting violence? If we need to strenghen them then that's an opportunity for discussion. Do we need to talk about our free speech laws? I frankly think it's time to have that discussion, and not quite because of the reason you may think.
Neither of those discussions is this discussion though, and that's my issue here. Facebook is (as another more eloquent commenter said) a megaphone. Why are we blaming the megaphone?