Except Obamaphones are extremely useful for tracking criminals. Many a murder mystery has been solved from cell tower dumps of Obamaphones checked in. The government has gotten most everybody wearing a voice and video recorder/GPS tracker that also logs who knows who. It's a police state dream come true. Someone turning off their Obamaphone for an hour or two is certain to attract special attention.
I didn’t consider that aspect. I suppose it’s a toss up between prevention and apprehension.