Big mistake people make with car rentals

When you connect your gadget to a car with Bluetooth, the car stores your phone number to make it easier to connect later. It also stores your call logs, including any contacts you dialed. Just one problem: All that information is saved inside the system and just sitting around for the next renter to find.
http://www.usatoday.com/story/tech/columnist/komando/2015/07/03/komando-car-rental-mistakes/29614165/