Well, it depends on exactly the degree of non-lethality guaranteed by this weapon. I have to ask what happens if you focus this device on a person who has a pacemaker installed. Or a cochlear implant. The lesson is that there is no such thing as a non-lethal weapon, only less-lethal weapons.

And regardless, I still can't get what's wrong with the water cannon. It's a tried and true crowd control method, and yet it's not used at all anymore in the U.S. What's cheaper than a water cannon?