I've seen first hand what texting and driving does. After the impact all I could hear and see was my friends wife dying in the back seat after being rammed from a texting 15 yr old who stole daddy's car to get some Taco Bell for his girl. Mass times velocity squared is an awesome physical equation un less you are on the receiving end. Phone companies have the technology to shut down phones while driving but they  and the government love the "marketplace" to much to let that happen.