Whether or not -YOU- think it's an invasion of privacy is irrelevant.

[TANGENT]
There was news story this AM (local, I think) of a woman convicted of vehicular manslaughter after her young child was killed when the woman sped away from a store where she'd been shoplifting and she hit a tree. the woman is, in turn, suing the store for chasing her.
[/TANGENT]

The point of the tangent is that it ain't only the law, but the sometimes capricious implementation of the law that dictates how things turn out. So, I'd agree that it doesn't matter what I (or Greg) think, but how the relevant laws will be applied.

LoJack has been operating for years. It is an embedded process, more or less, that collects location information and sends it to a central station which then forwards that info to the police. OK, so maybe it doesn't send phone number and/or IP address, but I agree with Greg that those are not really private. No car thief has sued LoJack for invasion of privacy that I'm aware of.

Jim