There was also meta-moderation, which allowed the community to deal with bad upvote/downvote behavior - brigading, stalking, etc. It wasn't perfect, but it did avoid the near-universal ills of moderator bias (including unconscious/cognitive bias), burnout from over-exposure, and flat out anti-empirical theories about how to do moderation properly. I wish more experiments like that had been tried (kuro5hin also made some efforts and Advogato took it even further) instead of basically reverting to a Usenet-era model.