That is the stupidest thing I have ever seen. I never leave my orange defense balls up on the counter. I hide them under my side of the bed in case someone breaks into my house in the middle of the night. I keep all my extras (and bigger calibers too) in the safe.
As these can be had over the counter.... Robber brings 20 of these things and blasts everyone in the room with them and then some on the way out the door in a crowded area....