It isn’t the mental health sites that are the problem, most of the sites I check use RSS.
I have a foldering system which indicates how likely they are to cause an episode. General news sites get put in an “only check this if you are feeling strong” folder, more targeted political news is a tier down from that, all the way to things like webcomics which are marked “probably safe”.
Facebook and twitter have no way to implement that, and I think they have no interest in doing so. Sadly, LiveJournal and it’s forks do have something like that, but not enough places use them.
