I think things find their own termination point, different, probably, for each person.
The problem is basically two-fold: people are seldom convinced enough by opposing arguments to really accept them and change their own stance; with some peole it becomes a case of losing or not losing face, which turns it into a last-man-standing scenario which is the most boring thing into which to drift. It used to be okay in western movies, but not on the web.
Rob C