If he sounded a fog horn...
If he sounded a fog horn, he'd be arrested for disturbing the peace.
My suggestions to anyone that has problem with these devices, is they take a fog horn and set it off inside any shop, retailer, or through the letter box of anyone that uses them.
If it's fair for them to target you, it's fair for you to target them. Good for the goose, good for the gander.
See how many shops appreciate you setting off fog horns in their store to drive away their customers, when they set off these mosquito devices in the street outside to drive away children. They have no special claim to that street, yet they think it's already to sonic-attack people? Well if it is then its fair to sonic-attack their customers.