There's little incentive for good moderation, and there's little cost for any moderation, which makes sites business models work. I agree with you that it has

There's little incentive for good moderation, and there's little cost for any moderation, which makes sites business models work. I agree with you that it has gaps and ugly side effects, but it also has the effect that a lot of things are working because you're not by default responsible for them because they've been commented on your server.