I think from the blue posts, blizz was getting a lot of whining on Multiboxing in battlegrounds. To be honest that is why I have never PvP'ed due to I always believe it is unfair, 5 characters vs. 1 really seemed wrong to me, it always felt like becoming the playground bully (regardless of whether a clever single player being able to wreak havoc with a team, most players got single shotted X 5 before they could do anything).

The caveat is, will they remove Multiboxing from the game completely down the road.