There's always the option of turning chat off if you can't see it it can't bother you. And assuming the group isn't bad enough to wipe on that silly event they can't kick you mid combat so just roll with no chat up for the run. This game hardly requires chat to function anymore. Before LFD and all this crap reputation used to matter so its more of a its 99-100% LFD cross realm LFR's fault there are so many issues reputation doesn't mean squat anymore. The greatest thing about the old days is if someone was a jerk or sucked word would travel and nobody would bring this person now you are stuck with them til you can boot them.