I've done this for years. Besides worrying about the safety of the people driving when we call each other, it drives me rabid-ass crazy trying to converse with a driver. The driving distraction leads to long pauses, half-baked responses, wild non-sequiturs, fractured sentences...
Me: "Are you driving?"
You: "Um, what? Yeah..."
Me: *click*
MOST of my acquaintances learn quickly not to call me from their cars.
I have also done this for years. My partner thought I was overreacting until her best friend, who was driving while she and my partner were talking about nothing (of course), rear-ended another driver. Now my partner is finally doing the same and I'm suddenly not such a stupid, judgmental asshole. Funny how that works.
Sorry about the lack of clarity above: My partner and her best friend were talking on the phone from different cities. The best friend was driving; my partner was at home.
Me: "Are you driving?"
You: "Um, what? Yeah..."
Me: *click*
MOST of my acquaintances learn quickly not to call me from their cars.
Nothing is THAT important, other than maybe missing a daycare pickup.
Also, just because I haven't had the opportunity to remind you of this in a while: you're a moron.
I don't drive a lot, usually for leisure, and when I do, my boyfriend's always with me. I tell him to answer my calls for me.