But being collectively negative can be a positive experience. Obviously Facebook has never met Goth culture.

being collectively negative often means being exclusive and closed minded, which aren't necessarily negative in themselves, but over time i do think it hurts the collective participants, just as any non-thinking joiner activity can. disliking something, which often leads to not doing it, limit's a person's growth, and is thus more hurtful than liking something, which often leads to doing it, which can sometimes lead to thoughtful evaluation (though perhaps experience itself is what's important, not even judgments at all).