Motorist prosecuted for flashing lights

Turns out that flashing your lights to warn other motorists about speed cameras is illegal

http://www.bbc.co.uk/news/uk-england-humber-12115179

I don’t support speeding, but this seems a bit far. Whatever next? If a policeman overhears you telling someone about the location of a fixed camera, you get arrested? What about the warnings that come with sat navs?

Just wanted to put it out there….