When you are driving, your life and the lives of those on the road with you are the only things you should be concentrating on.  Your status update doesn't mean CRAP when you're dead.  Don't be an idiot.  You are not that good of a driver and never will be.  You do no possess super human qualities that keep you from making mistakes.  The risks are too high, the cost unfathomable.  Get off the damn phone and pay attention.  You are the only one that can decide you have had enough of people dying due to vanity.