Moderated = good. Unmoderated = flame wars.
I remember one post where a member complained about not doing their community service required by court order. Nearly every other post each member got on his case about not taking responsibility for his actions. That was a perfect example of how dissenting opinions are welcom as long as they are not disrespectful. Calling the guy who made that post an idiot is disrespectul. Telling him he needs to take responsibility for his life is not.
See how I respectfully disagreed with giblfiz?