What olddude said.

I remember with amazement that through the early '80's I sat at my desk at work and smoked, that I routinely smoked in public places like restaurants and bars, and in my houses and apartments. There were even classes in college where the professors allowed smoking. Today, the idea is unthinkable to me.

Times have changed, and for the better. This is a good law in spite, as Joe noted, the occasional absurdity that may occur.