One thing that trolls do to derail threads is make the discussion all about THEM.
Yeah. Alas, even trolls need love, too. LOL.
Yes, that is their goal.
Anyone can get upset on a particular thread and spout off. But when it become a nightly pattern to troll, pick fights, claim victimhood, troll again, jump to the next thread, troll, pick fights, rinse, repeat, then the person should be banned (my opinion).