What are your views on cell phone usage while driving?

Had you had any close calls with another driver on their cell phone either talking or texting?

Today I ran a quick errand and in the course of a few minutes had a couple of close calls all due to the other driver using their cell phone while driving and NOT paying attention to the road.

I feel at the very least, they should have mandatory hands-free devices and a no texting while driving. In my state they just passed a no cell phone usage while in a school zone.