i just cover my brakes, that fucks them off!
i remember a few years ago i was with a mate on the motorway and someone was getting right up his arse in the middle lane then the fast lane, think they wanted a race! he gave the brakes a jab and the car behind locked up and spun the car off the road and into a verge next to the hard shoulder. dont know what happened to them but they certainly learnt their lesson.