No, we shouldn't censor smoking because impressionable people might pick it up, we need education about the effects. I had it drilled in my head on the effects of smoking since childhood and that didn't have cartoons and action movies sway me at all.

No sex on daytime TV or rating labels isn't censorship either, it's just time-appropriate scheduling and warnings. G to PG-13 rated shows on the daytime for kids, and R rated stuff at night when they're asleep? Cool. Censoring anything with sex and nudity because The Children might see it? Not cool.