[lentulusgracchus]

Or you could get creative and turn your glove compartment or console storage into a little Faraday cage grounded to your auto body.

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.

[lentulusgracchus]

Oh, and it goes without saying .... fight off any attempt to tag your car electronically by toll-road proliferators (like Texas and Kansas).