So get this. Freehold +14, goes very well up to the first boss. The group is too spread out and the boss charges at a player outside the boss' area, and he despawns. While we wait for him to respawn, a dps just fucking bails without a word.
I got pretty pissed.
I can understand bailing when it seems like the group won't make it in time because people died too many times, but when it's some really random thing that doesn't mean anything, and people bail, that I can't accept.
There should be some kind of penalty, if not game penalty, at least a social penalty like a statistic added to the Armory and check-able by Raider.io, that shows number of leavings before the completion of a mythic dungeon, per season. So chronic deserters get spotted and avoided, plus no one would appreciate getting negative statistics on their account, and would try to actually not leave at the very first thing that doesn't go perfectly.