It's sad that people are so stupid, they need laws to protect them from themselves. Can't tell you how many times some nitwit with a smartphone has darted out into traffic , not looking where he or she is going, and nearly been run down. I've personally seen some near accidents. And the same goes for people with I-pods or listening to music on their phones. A day or two ago, there was a local news story about a teenager walking a trail who was hit by a train. She was so busy listening to music on her mobile device, she didn't see or hear a train coming as she was crossing the tracks. She was lucky the train was moving slowly and she escaped without serious injury.
Personally, I would rather the nanny state butt out and let these idiots get hit, but I suppose it's become too costly to scrape these people off the street or tracks when they get hit.