drunkAnyways, this bloke is going on about a anti-hijack device where at the push of a remote button the car will lock up and stop dead.
Well I have a better idea, load the car with explosives and have it triggered off by a secret code word sent via sms, when you're car jacked all you do is pull out your mobile (or if that was nicked too goto almost any BT phonebox) text the code to your car and make a very big hole in the motorway. Volia, car theift instantly drops overnight.