Spamcan
Your RT licence or ATCO licence is only applicable when operating from an authorised location, i.e. in a radio licenced aircraft or an ATC unit. So in theory you could be prosecuted, although common sense would dictate not - as long as you don't call the police mans horse gay
http://news.bbc.co.uk/2/hi/uk_news/e...re/4606022.stm