Which brings up the point that good moderation is something entirely different. Good moderation involves a person actually emphasizing civil discussion and providing an alternative to argument by shock.
Of course, some fair portion of larger social networking systems today might well be described as "what happens when you remove all moderation" in multiple senses of the term. With that situation actually spilling over into a lot of society with attendant problems (as well as the more invisible problem that real problems get ignored).
Some systems now seem to be aiming for an opposite to this. Kialo is one effort but their approach to debate seems to rigid. A more "personal" approach where the debate is open but assumption of reasonableness is simply implicit would work better imo.