I met a lvl 63 horde shaman 5-boxer when i exited Blood Furnace yesterday. Had some fun for some minutes but then went on with the grinding. Guild was lollipops or something. Also met a 5-boxing druid team in ungoro a while ago, same guild (lollipops), possibly the same person.

Wish i had the time/effort to reroll horde though, pvp queues alliance sides are horrible.