People on cell phones get a lot of the brunt end of "distracted driving" talks, probably because they're very universal and obvious. However, there are many other forms of distracted driving: changing the radio station, shaving, make-up application (very bad!), eating, etc. Cutting out cell phone usage that prevents me from calling in when I see the vehicle mentioned in an "Amber Alert" (a missing child alert here in the states), or reporting a drunk driver or other road hazard, I see this as a step backward.
It all really does come down to personal responsibility. Unfortunately, "responsible" people are sometimes few and far between.
I do agree with the haunting prospect of the "average stupidity" comment. :(