Drivers tests should consist simply of having a large, buzzy, non-stinging insectWhimp! (Just kidding - kinda.)
I specified non-stinging for the test. The ability to readily discern and evaluate the severity of events inside the vehicle is also taken into consideration. I was thinking of the giant grasshopper, a buzzing cicada or a large carpenter bee...the kind that scares the the hell out of you when they buzz through your window.
I don't care if people are talking on their cell, tuning their radio or eating a sandwich when they're driving...provided they're paying attention to the road and the traffic around them. If they're driving wrecklessly or allowing their secondary activity to distract them, there are already laws for that. Passing a new law simply impedes on people who can enjoy their freedoms responsibly.