This just adds fuel to the fire favoring police location apps, where users who spot police vehicles, in this case DPS vehicles post on their app and all app users receive notifications, so anybody nearby can turn off their cellphones - - or, "clam them up" in a ball of 50 layers of aluminum foil slit on the side. Of course, police will merely start placing hardware in inconspicuous vehicles then. What if there was a way to massively FLOOD these devices with spurious data though?