BILL SCANNELL FELL DOWN A RABBIT HOLE. All he wanted was to disable a device in his car: An always-on, net-connected “helper” that provides the car’s driver with app connections, turn-by-turn navigation, and roadside assistance… at the expense of personal driving data. Similar devices track how fast you’re going, how hard you ride the brakes, even your final destination. And all that info gets sent back to the manufacturer. Scannell wanted out. Unfortunately, it was easier said than done.