My question to you would be why? And if you answered because of their % of the whole population, I'd tell you that you were crazy, because most of the people in the movies are beautiful people, and I am pretty sure they represent an even smaller % of the whole population.
As for smoking, when I grew up, smoking was for adults. A lot of adults will smoke in front of kids, but I didn't like to. I didn't like encouraging kids, through my example, to do something that I think is bad to do. I was smoking for many years just because I couldn't stop.
So to me, smoking is a beat scene, man. And if someone wants to say depictions are rated R, ok. Just let folks know if that's the reason it's r. THey have ratings on direct tv that tell you the specific causes for the rating, so you know if it's nudity, or violence, or language, or all of the above. So add smoking. What's the big deal? How about pot smoking? Should that not get an R?