I was responding mainly to his comment on downvoting. At 200+ answers I've seen some moderation, but never been on the receiving end of it.

Having been a Wikipedia admin, I'd say Quora's doing a reasonable job. Moderation always feels arbitrary to people on the receiving end of it. And bureaucratic, too, if more than a few people do the moderating.

I accidentally hit the downvote button on your comment. Sorry about that. Someone else can feel free to counter it by upvoting the comment. I completely agree with what you are saying, by the way.