Yes, all cars ecxept "special" ones (police, swat, etc.)
I don't know
I think it would be far more useful for cars to have a black box, which could be accessed only via search warrant or court order. That way, you can be held responsible if your driving causes an accident.
I'm already gearing up for Finger Vote 2014.
Just for reference, means my post was a giant steaming pile of sarcasm.