A bubble should protect you and people should see it and think twice about challenging a defender. He should be able to fire from within the bubble. It shouldn't become his prison. When you think about it. There's no reason you shouldn't be able to. Just look at the tether. Tether is kinda like a bubble, but the opposite. It makes enemies easier to kill, all while allowing you to freely move around. Tether is b.s. because it pulls your scope down when you are shooting at your enemy.