Monty Python had it right. Some people really would pay to sit in a room to have an argument. The modern day equivalent of the Python's Argument Room would be a chat room, a blog comments list or a mailing list and people don't even have to pay. Here they can provoke others into spurious, circular arguments that get nowhere and some people clearly just love it as a sport.
The OSM-talk mailing list has become the pitch for this sport. I'd like to see a bit of proactive effort by the administrators. When someone is repeating the same old stuff, over and over or when their posts exceed a certain percentage of the total posts, the administrator should ask them, off-list, to be a bit more restrained. If that doesn't work then a public naming followed by a suspension or ban might be in order. Let's get the list back for useful exchanges and banish the trolls.