Pillar-humping crybabies that can't admit defeat + AFK arena. Gotta love what Blizzard has done with the place, eh?

IMO, if you're outnumbered 3-1 in arena, they need to initiate a 5-minute timer: the last guy left has 5 minutes to kill the other 3 or forfeit automatically. Way too many ways to legally grief people in WoW PVP.