In WoW tanks did the same thing fished for a group that was in progress so they could get their Valor Points done fast. DPS complained about it. So Blizzard eventually took out the feature that showed how many bosses were killed when the queue popped. When I played WoW I was a tank I would also fish for a group that was almost done just because it kind of saved me time. You can't blame people for wanting to get their points done fast.

Its kind of weird now the same thing is happening in FFXIV.