OOo interesting. Maybe it's one of those "decision pending" things and the people who took them down were, er... scared off by lawyers making noises. Of course

OOo interesting. Maybe it's one of those "decision pending" things and the people who took them down were, er... scared off by lawyers making noises. Of course the manufacturers would assert legality. With a quick read it seems to me a noise, even if intended to cause distress would not likely be assault, but might be injury to the person above a certain high SPL level of decibels. The more obvious thing I see is a public nuisance angle. Even if the police wouldn't touch it, local authorities could, as an environmental health issue.