Well, first of all, you've to make sure there's no traffic up ahead or if the police catches up with you, you gonna have to do a hell of an explaination. I did it once on my way to Chonburi at the motorway. Was travelling around 120km/hr and out of no where, we spotted these police up front trying to slow us down. We slow down a bit towards the police and while he flagged us to the side, we "ZOOMED" away. Seeing the policemen cursed and sweared on our rear mirror was kinda funny. No, they didn't track us down till this day.