So when can we use this?

Just as with any new technology, GPS tracking poses certain little moral and ethical problems. Sure, there's none at all when GPS tracking is being used by a fleet manager to monitor his trucks and drivers. We all see the benefits there.

But what about keeping an eye on where the teenager goes? Parents might think that GPS tracking is a great idea there, but what about the teenager? Isn't having a car one of the rites of passage? That first taste of the freedom it is to be an adult? And if the adults are peeking over your shoulders all the time, where's the freedom gone?

But I have to admit that there is one area that really quite scares me. GPS tracking is an eswsential part of any road pricing scheme. You've got to be able to know where the car is, when, and who is driving, in order that you can charge them for the use of the road.

Now as an economic type I can see that road pricing is the only way to ration that scarce resource. But I'm really really uncomfortable, as a civil libertarian, with the idea that the government is going to be tracking the movement of every auto in the country all the time.

So what's your line? Where is the use of the technology, the benefits of it, over ridden by the costs to other values?