There's a few of us over there. There used to be a champion troll who went by the handle "Philoslayer" and would take the most comically extreme leftist positions, forcing his fellow DU'ers to actually argue against him. He racked up thousands of posts before finally getting banned.
The way I look at it, trolling on DU is a form of psy-ops and all's fair in war.
I remember when I got banned.
I offed the gentle opinion the fairness doctrine should apply everywhere, not just talk radio.