as it should........

rogues who use a mainhand 1h and no other weapons
dps warriors who use a shield
mages that randomly throw up ports just for fun
one group member who "accidentally" clicks on the portal because they were "testing the range"
all out dps on every mob, even bosses no matter that the tank is CONSTANTLY pulling mobs off you
dps holy priests
wearing absolutely CRAP gear because it "looks pretty"
waiting around for people to find the dungeon you are at because they have never been there before
warlocks who don't believe in using pets