To me it's the one thing that truly does. I've been here ten years and I think the moderation is the unsung reason it's survived and manages to keep going. It's actually not obvious at all how personal and deep the moderation is until you get on the wrong side of it. If you've never been banned, it's like the invisible protocol that keeps communication flowing smoothly; you don't ask what that protocol is if it doesn't break down. It's quite subtle, at times almost sublime in that it's capable of weighing humanity against dread/mob/internet. So in my observation over many years, I think that is definitely what has made this site unique.