I used to let AH's nastiness affect me. One day, he called me the worst name ever n I just sat there. He yelled, Did YOU effin hear me?! I asked, What? He said it again and got no response. He got up n left.
Usually, when no one plays with them, they're forced to play with themselves n sh*t, that's no fun so they move on to the next tactic. And you, you just keep your game face on. Ignore. Ignore. Ignore. They eventually get tired.