Those can definitely be lethal for many people.Nah, of course other non lethal forces would work. Public humilation deters, you dont have to laugh at the guy with the gun to get the next guy to not have the gun. And also, in this specific example, you can use say, a projectile taser gun for instance.
And how would a police-person know the difference until it is too late.
oops...sorry just doesn't cut it then.