So I just wanted to try out this air mouse for myself.
Personally I think it could be used as a gun, as long as the setting were tweaked just right.
My idea was something along these lines:
The back button can be assigned a keyboard input. What if there was a program running, where there was a hotkey, say shift-1 (or whatever) that centered the mouse cursor automatically. That way, you hit the back button on the mouse everytime you wanted to reset your aim ?