A while ago I wrote a post about law enforcement putting GPS devices on people's cars.
Exhibit A of where this is exactly headed:
And here's something I predicted would happen concerning the device if it was found by the car's owner:
Oh, how I wished he had refused to return it, or destroyed it, and made the government jump through legal hoops to get it, or better yet, try to prosecute him for destroying something abandoned in his car and attached to his private property.
This is bad. Very bad.