As the recent owner of a cell phone with a blue tooth I find its use to be simple and non distracting. In the past I have used a hand-held cell phone while driving and agree it is a dangerous thing to do *depending on circumstances*.
I have some driving that requires concentration, with traffic, side streets, exit and entrance ramps, etc. Using a cell phone in those conditions is foolish.
I also have some driving on deserted country roads and even near-deserted four-lane highways. No reason NOT to use a cell phone there.
It is a matter of judgment. Use of the blue tooth makes it safe to use the cell phone under a wider set of conditions.
I do see OTHERS using cell phones, smoking, and holding a cup of coffee while driving. They tend to have troubles keeping a constant speed and staying in their lane. A cop should be able to pull them over under *existing* reckless driving laws.