In cata, there won't be battlegroups.
What? Explain. I don't believe they are abolishing battlegroups...

And I'm talking about Battlegrounds, where the players are running around uncoordinated. Without coordination, how the hell can a bunch of people who have never met know to stun the main toon, and kill slave A ? In my experience in Battlegrounds, EVERYONE attacks the main toon, and theres never any coordinated pressure on a slave.
Bloodlust Battlegroup has more Boxers than any other group anywhere. We have so many there you often see another boxer in AV on the BG weekend in many games. both sides. Therefore, most groups of people have dealt with boxers and have devised clever ways to be more annoying than the average bear. Doesn't matter if that particular group of horde / alliance have never met, they have likely met a boxer in their BGs before and found what strategies are more effective than others.