Say whatever you might about the device, but the man is a pro-gunner.
Personally, I believe that this device could be incorporated in a regime of firearms safety with a little training. If one had children, one could train to have this round in the chamber at all times, then rack once before meeting the aggessor. I know that personally, the few times there was an odd noise downstairs, I had the presence of mind to follow all my safety and procedural measures when investigating, using standard flashlight-pistol wrist-lock and consistantly doing the old 'cutting the pie' manuever. If I can do that when freshly woken up, I can also remember to rack the slide once.
Like I say, this device is not for everyone. But it might be for some people.
But that's just me. As I said several hundred posts ago ... this guy is free to push his idea all day long as long ... as nobody tries to make a "law" out of it to force me down that path.