Thing is if they know where your car is, you won't need a tracker if it gets nicked will you?
I'm figuring there will be enough cheats anyway chipping the thing or even driving a ringer sans device whilst leaving the tracked one at home.
Its not the idea of the thing I am against but the price, if fuel duty were abolished and the road fund licence as well, then it might work out.
I still don't see how it will work in tunnells and steep valleys or during high sunspot activity, or when your on your mobile.
Its not going to be 100% accurate whatever. And beyond that considering the amount of opposition howmany people will simply disable it and hope to get away with it, after all if the cost is higher than any penalty what the heck, drive around in an uninsured, heap and let them crush it if they catch you.
There are still people out there who have never paid for a TV licence.