Going in DF as a tank I've ran into more of these premade troll groups who do everything to make you fail. Healer in cleric the whole time, minimal heals and each DPS attacking randomly. They ignore markings, pull at random, use custom tells to trash you, spam medica and regen... sigh. If it happened 2-3 a week I'm annoyed but whatever's. But several times daily... its absurd. You are trapped and at their whim unless you cut and take a 30, get kicked or they don't roll on loot and stay in battle so you cannot do either.
If I screw up I own it and fully expect grumbling. In honesty there is very little you can really do. If its really bad I usually wait 15 and leave. Mostly I'll reply with "Warning, party trolls detected, commencing random cat humor" then answer everything with meow, paw licks or "Puuurrs at your keyboard warriorness"..etc