Smoking And Movies

According to CNN there is a group underfoot who desires to make cigarette smoking an R rated movie.

Imagine that just having an actor smoking will get an R rating. I am not in favor of smoking and do not smoke at all. How should historical situations be treated. A solider smoking gets an R? I think not.

Why not extend this to all undesirable behaviors. Anyone who takes and aspirin, R rating. Anyone taking Phentermine gets an R rating. Let's be real, these items are not illegal and do not deserve this R rating. So why should cigs?