I support the above sentences.

But On-Star is a bit creepy (I was hesitant to enable GPS on my cell phone, once upon a time), and I wouldn't pay for such a service.

Which makes sense. Why would the company track and record your car's every move? That's a lot of data to store, and storing massive amounts of data costs money. How would they profit?

But any wackadoodle could camp out by her school and track her that way. There will always be some creepy person doing something.

On the other hand were she do turn up missing her phone could be used to find her. So you have to take the good with the bad.

Make a deal with the local towns. They have cameras to catch you if you run a red light. Why not send out a ticket when your speed exceeds the speed limit? They have all the pieces, your speed and your location. It could all be automated easily.

I think your idea of "massive" is a bit outdated.

A set of GPS coordinates can easily be stored in a single long-integer.

That means a single $400 Terabyte drive could hold something like 137,438,953,472 position records. Let's say I'd like to track a car for every person living in Los Angeles (~9,949,081). With just the hard drive atached to my own personal PC I could track 13,814 descreet locations per car.

Any minute now, Sylvester Stallone is going to jump out from behind a bush and knit a sweater.

Related: In at least one case, records from a Fast-Track automated highway toll system have been used to prove in a divorce case that someone was cheating on his wife.

So this does not worry you?

I dated a cop in the 80's and my best friend's mom was a highway patrol dispatcher. This has all been common forever. Her mom would always "check out" her dates.

In a way, On-Star is sort of like Santa...