> If users change their opinions easily, they will be attracted to the extreme ends of the polarity spectrum.

This is an interesting result. In general, I think most would agree it's a good thing to change your opinion based on new information. Yet if their model is correct, doing so leads one away from what the author implies is the ideal neutral position. So, is it a bad thing to change your mind, or do thinking people naturally gravitate away from "ideal" neutrality?