I usually look to see whos calling. If it's important, I'll pull over and call them back...if not it gets ignored (usually my roomate, who always asks me to pick him up either beer, or something else that he could walk a block for...I jsut ignore his ass and tell him i couldnt hear the phone when I get there).
When driving, ALL calls get ignored...I won't even touch the phone. This has aggravated my boss a few times, but I told him...if i am required to answer a phone while driving...would they be willing to cover any legal suits that whould happen if i was to wreck as a result...usually he answers with a "no, but"...usually he gets the idea mid sentence and shuts up....pity this talk happened every other week...but oh well...he was the one to have two crashes while on the phone, not me.
As far as I'm concerned, anyone who talks on the phone wile operating a vehicle needs smacked upside the head a few times. There is a time and place for everything, and if your moving at all, get to a safe spot before talking...I don't care how safe you think you are, just do it.
I have huge rants over cell phone users...Given I'm "Mr. Make it quick damnit" when I'm on the cell. i hate using the thing, it makes me feel like a tool using it. Given I love using the wireless internet features...but I hate talking on it outside of my own home. I guess I jsut learned the time and place for everything, and using a phone outside of home was usually a very short and to the point affair.