I thought “Troll” came from “Trolling” like when you’re fishing with a trollin’ motor and you’re moving the line and bait up along the banks, hoping somethin’ will bite and BAM! Dinner!
Well, from what I’ve seen, over time, is that it’s a “buzzword” and is used primarily and most loudly when someone is disagreeing with you... that seems to be when it always comes up.
But, yes, I’ve been out in the boat trolling, too. That’s more fun that the yelling matches that can happen online... :-)