Let's start by stating the obvious.
NJDan is stubborn, obtuse, fractious, incapable of admitting error, and a bunch of other things. But, so what? While he can be a royal pain in the ass, he is not what I would consider a troll. As a matter of fact, he has some of the attributes that are often prized in discussion forums. He starts topics, he argues with everyone, he doubles down when wrong, but all in all he is pretty harmless.
So the question is, should NJDan be banned for being a pain in the ass? I am in the camp that he should not, but reasonable people might disagree.
Besides, if we did not have him, who would we feel superior to?