Are you more stimulated to take part in a thread where there is a dispute going on versus people simply exchanging concepts or opinions ? In other words, let's say you see a thread on the kinds of engines near and far future spacecraft would have, for escaping the atmosphere or navigating in space itself. If you saw a thread that criticized a popular method that is used ( or which have had plans whose general details are available to the public ) for such propulsion, and you had some subject matter knowledge, would you be just as liable to participate if someone asked (neutrally ) what method you advocated, OR if they took a stance where they badmouthed a proposal ?
I was going to use an example other than rocket propulsion, and pick music groups or politics etc. but then we might have gotten off into a discussion how these subjects had been brought up so many times that both argumentive and neutral aspects of these particular kinds of threadbuilding were somewhat boring.