Hellas, if I catch a guy with this thing fitted, weather he used it or not, I WILL arrest him for obstruction of justice!! Its for him to prove in court why he has it fitted if he doesn't plan to use it to break the law!! :dunno:
Same with scanner/laser detectors/jammers... If I catch you with one fitted, I arrest your ass, and its for you to prove in court that you didn't have the device fitted in order to allow you to break the law.