I use to get mad. Eventually I gave up. Unless they make this illegal - not much is going to change. Some places have made it illegal. Others havent.
If you text and drive... you are guilty of reckless driving. There are no exceptions. You cannot safely drive if your eyes are not on the road in front of you.
Yesterday, cycling to work going south on Lee Hwy, another driver who was texting rolled through a red light. AT&T has a campaign "No Text on Board: It Can Wait." Take the pledge. Dont text while driving (and dont text while cycling - really, that had to be said??).