Here's a link to an article from AP on how people are getting into trouble for using GPS devices to track ex-GFs and ex-wives.

I actually had thought about using one of these during my W's A, but for better or worse (probably better since A ended soon after my thought), the local Best Buy did not have an appropriate model. It seemed cheaper than hiring a PI and I was curious.

Anyway, in the interest of sharing information, here's the link.

Hi-tech stalking