The worst one I've seen so far was yesterday. There were probably 6 horde fighting 2 allies, 1 dps and 1 heals. During the middle of the fight my hunter and 3 others all just ran from the fight in the same direction. Got far enough away and all stopped and mounted. So the 4 of us left the other 2 horde to die. I've still never received a whisper though.