(Recently) on Highway 87, I stopped at a red traffic light. A van pulled up beside me and the driver was a woman who was in an animated conversation on her cell phone. She paused at the signal then continued straight through the red light.
Luckily no cars were in the intersection or there could have been a terrible accident.
I have a cell phone, but I use it responsibly, by pulling over. I do not use it for social purposes.
Since there are citizens who fail to understand you cannot concentrate on driving while chatting on a phone, perhaps it's time we adopted an ordinance against phone usage while driving as many towns have done.