As soppy said, there needs to be more enforcement for some people to take notice.  Maybe a hard-hitting public information broadcast on TV like the drink-driving Xmas ads might help?

I gather that people have also been fined for eating a sandwich when driving.  If that is considered dangerous - something you can actually do without taking your eyes of the road, assuming the sandwich is conveniently placed and you have some sort of hand to mouth co-ordination - where will it end? Will it be illegal to eat a sweet?

If so, then it makes no sense to allow people to change CDs or radio channels since they probably have to look away from the road to do it, or to change the heating switch for airflow direction.   

Sneezing is potentially dangerous, a considerable distance can be covered during the pre-sneeze, sneeze and recovery period.  Should people with hayfever, allergies and colds be banned from driving while they are suffering?

Yes, I know that's ridiculous, but lets see some common sense about what we are allowed to do while driving. 

Certainly I think there needs to be more enforcement and education about using mobile phones which is clearly dangerous, and proven to be so, before adding other activities which may not be dangerous and haven't been shown to cause accidents.