Onstar , bringing down the horse

I would like to start by saying what a brilliant idea onstar is for car owners to have. You can have instant emergency assistance after an accident even if your unconscious. You can have onstar unlock your car for you when you've locked the keys in. You can even have them locate it and shut it off if it's been stolen. Now let's discuss the idiocy of allowing such a system in our automobiles which we count on for our very survival. We are all aware of computer hackers. It is almost a weekly thing that one of my friends on Facebook gets their account hacked. What is going to happen when all cars come with onstar or something similar and all our cars can be remotely shut off? Who's to say a hacker from an invaded country won't shut off every car in new York before obliterating the place leaving little or no time to flee on foot? Did anyone think of that. Seems like a good way to bring down a country doesn't it. I for one would like control over whether or not my vehicle runs. Technology can be a wonderful thing but you have to take a step back and wonder who is running the show. On another note, with onstar in your car anyone who wants to, hint hint can listen into your conversations. So you better be on the up and up. Watch your back.