I wonder. Rumor has it that the shame of doing this evil deed has become so complete in this society, that even pretty top level inhabitants of the White House feel they have to do it outside:

Though the first lady promotes health and fitness, and works out, Kessler writes that she is a “stress smoker” who sometimes steps out onto the Truman Balcony at the White House for a cigarette. “She wouldn’t tell you she never does it,” Bush friend Dr. Charles Younger told Kessler, “but it’s not an image she would like to promote as a healthy habit from the first lady who is supposed to be perfect.” http://jscms.jrn.columbia.edu/cns/2006-04-18/brumback-laurabushbook

Visualize the most powerful man in the world feeling he has to sneak one in a White House bathroom with his head sticking out a window?

The situation, it's worse than prohibition.