My car's company isn't on the list, but I can't imagine they're any better. My car is a little older, though, so I don't think it has any way to phone home with any data...
Do new cars make you sign into your wifi with them or something? Or do they need a data connection? I suppose you could just not connect them, or even modify the hardware so it can't transmit. There's a joke here about putting your car into airplane mode, but I can't find it.