If you don’t want Big Brother spying on you turn your cell phone off and wrap in tin foil when you are not using it. It will not talk to the cell tower or respond to GPS. This will allow you to bury the body and get out of the area undetected. :-)
WHAT!! Don't ask me to destroy my hat.
But be sure your car doesn't have Onstar or a GPS transponder of any kind. And you might check with an auto-electronics shop to see what it'd take to get your onboard black box to stop recording your data for after-accident snooping by insurance and police dicks.
And don't insure the car with companies like Progressive that like to bug your car.