I don't want the 'perps' the hear the sound of the pump. The only sound I want the 'perps' to hear is their chest exploding from a well grouped triple tap.
Not everbody is in it to kill, if the situation can be defused by less than lethal means I am all for it. Why use deadly force when they turn and run the other way. But if a life is being threaten then by killing the perp would be justified. I know this stuff because every now and then I work in military security.