Someone want to make a bunch of money; write a program that will make the text feature interoperable while driving. It would be easy to write, just make it work off the phones GPS and if the phone is moving at a certain speed say faster then jogging the text feature wouldn’t work. I would probably have a parental lock on it as well.
If you do please STOP. In fact try to pay attention to driving your car it is not you I am concerned about but the poor sap you are going to hurt. My wife and I were rear-ended last Feb. by a distracted driver and both are doing all we can to avoid Disc surgery. It has set us back more than I could imagine.