Pretty sure that a number of studies have pretty much shown that people talking on cel phones while driving have impaired abilities. Some were reported to be at the level of drunken drivers. IF this is the case there's no justification for leaving it legal, just because it is conveniant.
Numerous times I have had to avoid an ijit on a cel phone, driving on oblivious to situation and conditions.
On the other hand, years ago I saw a show were they talked about a study where the drunk drivers that were tested were hard drinkers who regularly drove. They drove much better than the usual subject, a non-drinker who has to force down three or four shots. One of the things the show said was, you won't see this mentioned much, as it goes against the commonly held idea.
Of course, I nearly got into a bad wreck on the highway late one night due to a drunk who fell asleep, his car sitting on I-10 in the middle of the New Mexico desert.
