I've only multiboxed in AV which helps to avoid this kind of attention.

I think the best advice though is to ignore comments in BG chat unless they are folks calling out incoming to the various flags.

Being a boxer just makes you the biggest target for their scapegoat. I've played enough solo battlegrounds and seen the usual crying in there to know that they will always blame someone. If you weren't there it would be "OMG you guys Suck. I wish I'd rolled <insert opposite faction here>". The irony being we all wished he'd rolled the opposite faction too

The best ones are where you are told continually through the course of the BG how everyone on the team is a loser, how much you suck, how you need to learn to play and then you win