I agree.
However, by using a device that can, in addition to determine the number of miles traveled, and on what category of road, your whereabouts could conceivably be tracked and I'm thinking this might not go down too well. Allowing this, will make the following conversation a fact of life a few more years down the road...
Of course, if you have nothing to hide, comrade citizen, you won't mind if I insert this rather large GPS chip and battery pack in an orifice of your choice. Now, where would you like it?