My car is equipped for OnStar, but the subscription has expired and I'm not interested in renewing it. One fine afternoon last year, without warning, it took over my stereo with a 2-minute recorded message about OnStar's features, encouraging me to subscribe. I didn't know where it was coming from at first, and I couldn't turn it off!
It wasn't triggered by some mileage marker like 75,000 miles. Scared the coffee out of me. They've got no business doing that. Set a little blinker to flashing on the rear view mirror, okay, and then the driver can press the button to hear the message. But this commandeered my radio!
(Besides, when -- uh, I mean if I ever have to dump a body somewhere, I don't want 'em knowing about it.)