Seems far less dangerous than a "Lawn Dart", but probably should carry a warning label not to use it near sensitive government installations or airports, where the orders might be to shoot first and ask questions later.
Does anyone remember a tv cartoon in the early 60s about some Eskimo named "Vavooom"(?), who never spoke, but just blasted problems away with his huge voice? So this is how he did it......
Probably would look pretty cool to shoot it through smoke columns from incense or cigarettes.
MRPLUTO