Wouldn't you want to be able to find all cell phones that were in proximity to a significant number of the burglaries at the time that they happened? I can see

Wouldn't you want to be able to find all cell phones that were in proximity to a significant number of the burglaries at the time that they happened? I can see allowing this -- with a warrant. I'd tempted to say it will stop working after the first few arrests but criminals can be pretty stupid.