I honestly never drop a group unless
Vote abandon
I'm having a very bad day

Like yesterday, a group I -really- should have dropped in the Aery (I was feeling it once the bard complained about low DPS, but then I told her to stop using Paeon at the very beginning of battle, and she told me it didn't matter because her DPS was fine......... I was feeling it hard right then but no I stayed) but it was okay in the end since we cleared it with literally thirty seconds left.

I mean I get bugged by a lot of things that people do but I'm not going to leave just because of a pet peeve, which is what those sound like, OP.
(Sorry)