It allows truly scalable global coercion: the automation of comply or die.
Call up the target on his/her personal cell (it could even be automated as a robo-call to get real scalability — wouldn’t that suck, to get killed completely through bot based automation).
Ask the person on the other end to do something or to stop doing something.
All the money is on cyber intel (to generate targets based on “signatures”) and drones to kill them. When domestic unrest occurs in the US due to economic decline, these systems will be ready for domestic application.
Drones also need to be built, communicate with people on the ground, refueled and rearmed. And if they are using your cell phone for tracking and terminal guidance that phone doesn’t need to remain in your possession. It might just be that a vehicle supplying the drone base could use an old cell phone for a few days.