We've heard for some time about the CIA using cell phones to track terrorists and kill them with missles launched from drones. "Stingray" sounds about like what I heard described. I don't think it has filtered down too much into the SAR world yet, but I'm sure it will before too long. I have also heard that there has also been some experimentation with using drones for SAR. Technology is definately a two edged sword!
If I ever decide that I need to run from the law, I will try to remember to hide my cell phone on a bus going the opposite direction from where I'm headed!