Quote:
The Mosquito emits a high-pitched whine at a frequency audible only to the ears of young people and becomes so unbearable that they are driven away from the area.
But hearing abilities vary in any age group. Some young people won't be able to hear the device, and some older people will be able to hear it.
Secondly, how else does it target "antisocial young people"? Does the shop manager control it? Does it target everyone? Is it set off by certain patterns of movement or sounds?
I can't imagine a feasible design that would allow it to only affect young people who are behaving inappropriately. It seems inevitable that people who are behaving properly will be affected adversely by it, which will then have a negative impact on the owner of the device (reduction in business, law suits, complaints, etc.).