I don't drink and drive because coffee deserves to be in ceramic. Not paper. Not plastic. Not stainless steel. Ceramic. Red, if I have anything to say about it.
And if you really want to curb erratic driving behavior, what you should outlaw is Rock n Roll, not cell phones. Specifically, signing along. That's my problem. That's why I listen to NPR most of the time. I can't sing along and I tend to drive more conservatively. When I sing along to Rock n Roll, I tend to exceed the speed limit. Just a little.
My driving becomes more erratic when I start dancing. Hard to do in a stick shift, really, but I suppose I shouldn't do it all. Not while driving anyway, and definitely not with the top down.
*"Fire" lyrics by Bruce Springsteen
Fire lyrics © Sony/ATV Music Publishing LLC, Warner/Chappell Music, Inc., Kobalt Music Publishing Ltd., EMI Music Publishing