Cell Phone Safety

I have seen a number of ads re:loved ones dying because another driver was texting.  It is so unsafe to not only text, but even to talk on a cell phone while driving.  Seems like there could be a way to disable cell phones when the ignition is activated.  While this, at first, would seem to be an inconvenience, a company that puts its customers' safety above all else, is the company that I would buy from.  I know that I would want my son to drive a car that put his safety first.  To reactivate the phone, the driver could pull over, and when he has turned the motor off, the phone would be available for use. 
Marshall W 10/28/2013
I think for this idea to work, the cell phone companies would have to cooperate and allow an outside signal to turn off their phones.