Banning 'all' phone use while driving is a reasonable solution in search of a problem.
As the use of cell phones has exploded we are seeing less and less accidents per mile driven.
More cell phones correlates with LESS accidents.
That isn't to say that using cell phones is safe, by any means. But it doesn't correlate to, let alone imply, any between increased cell phone usage and an increase in fatal* accidents. (I haven't seen any non-fatal accident data)
http://www-fars.nhtsa.dot.gov/Main/index.aspx
In 2009 there were 114 traffic fatalities per million miles driven. In 1994 there were 174 per mil. A 1/3rd reduction at the same time that cell phone use was growing exponentially.
Point being: Distracted drivers are distracted drivers, whether it's cell phones, texting, eating, signing, etc... Some drivers are just going to be bad drivers. And while I'm far from Libertarian, I don't see the value in creating laws as a solution when the problem isn't clearly defined.
IF cell phones presented the huge risk to society that some articles are claiming they do, why is it that the fatality rate is dropping (as I expect the accident trend line is as well, but I haven't found the quality of data to back that up that I would like). And if the fatality/accident rate is dropping, with out the creation of a new law, why create the new law?
-Rick