I put this here as it's news, but not strictly concerning music (but sort of, some members here would consider this to be music, but that's another story).
Today in the news here, there are reports of ultrasonic tones being piped around areas where teenagers congregate to ward them off doing things like vandalism. This is occuring in Western Australia.
These tones can only be heard by people under 25. They are described as being very annoying and high frequency like mosquitoes.
Proponents of this - eg. business owners or school authorities where youths hang out after dark - say that they are just protecting their property from potential vandalism and the safety/comfort of the majority of people who use these facilities.
Civil liberties groups say it's an infringement of civil liberties.
I could not find a report on Western Australia, but found THIS report from Canada in 2008.
So, is this kind of thing being done around your neck of the woods. What do you think? We've had discussions about this before, but to do with classical music (or crooners, or jazz, etc.) being piped around these types of areas, not sounds specifically designed to ward off youths & teenagers.