guess it is a joke but with a simple modification could be a good idea: replace live bullets with extra-thin soft case bullets filled with sh*t.
Ah, you want to volunteer for first test case of being hit at short range with Anything traveling at 3000 ft sec - even with 'extra thin case' (I'm assuming the 'light' water density load filling a standard M2 ball projectile would be faster than 700 gr Ball load? I don't have the volume but it should weigh one helluva lot more than a 180 gr 30-06 round..
You overspeed and and you get a burst that won't kill or hurt you but will make you remember it for long time.
If they produce it, I need a half dozen for Milano