Amen! To Kreg Battles, BS on it being difficult to enforce. You can see the screen illumination and if a cop pulls someone over, I believe they can ask to see the phone which would allow for verification by the timestamp on the text message.
http://www.courier-journal.com/arti...use+passes+bill+banning+texting+while+driving
http://www.courier-journal.com/arti...use+passes+bill+banning+texting+while+driving