My battlegroup has seen me play enough that some people cheer when I'm in their BG. I take control of the BG, tell them I'm multiboxing and that they need to listen to my instructions in order to win.

I recommend scaling back characters in the smaller BGs unless you are VERY good. I still contend that 4 is the optimal number for almost all BGs. If you are new, undergeared, or an "average" player, I would not take more than 3 into WSG, for instance.

If you bring 5 characters into WSG and then cause a loss, you deserve the verbal punishment.

I've been boxing long enough that most people who know me are quite happy to see me in the BG!