Liberal Prohibitionism

Saletan reacts to Boston banning the sale of tobacco products at colleges:

I detest smoking. But if there's no secondhand smoke and no secondhand driving effects, what are the grounds for telling a 20-year-old college studentlet alone a 25-year-old professional school studentthat tobacco is off limits? And if that kind of paternalism can be extended so easily from minors to 25-year-olds, who's next?