When you rent a car at the airport, use a car-share for a family day trip, one of the first things you are likely to do before setting off on your journey, is to connect your phone to the car. You switch on the Bluetooth and see a list of other people’s phones that were previously connected - Mike’s iPhone, Samsung Galaxy, Bikerboy_Troi, Dee Dee. You input your journey into the navigation, perhaps noticing stored locations of previous drivers.
Seems fairly innocuous? Wrong. Your name and…