Actually, it might be quite effective for dealing with thugs sneaking up behind you.
Don’t give big O any ideas.
This could be an mandatory alternative to death panels. Just mandate that everyone is issued one of these at 65 and every 3-5 years there after. It would be much more cost effective than death panels . . . o never mind, death panels are so much more fun and cost so much more. What was I thinking . . ./S