I did for the longest time.
Would go in and give an “I get that, but” comment.
They are real good and sniffing out truth seekers or anyone who disagrees with the group consensus and banning their accounts.
What was funny was I logged in as Eddie01.
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.