Why are YOU putting such restrictions on the discussion?
I think it's a bit incomplete to solely talk about cigarette use in film, when the real impact of such imagery is also contributed by TV, and ads.
It would be like talking about the effect of a sex-obsessed soiety, and ONLY talking about film. Ignoring the effect of radio, TV, internet, and print on the populace would be kinda "viewing a thread with blinders on".