It's not quite as rediculous as you think. I was in a discussion about this on gaiaonline, a california girl that was pissed off about the law, saying that it was a much bigger distraction to eat and drink or to mess with the radio or ANYTHING else other that wasn't driving with a cell phone.
The thing is though, you never hear about accidents involving one man's dangerous reach for the Mr. Pibb, and how he almost slammed into a bus as he marveled at the beauty of his burger...
THE BEAUTY!!! *Crash*
Meanwhile, there's been studies about cell phone use while driving (This was also done on mythbusters) and it was shown that driving while talking on a cell phone was nearly as dangerous as driving drunk. But it will never compair to the dangers of a double with cheese.... *CRASH!!!!*