John Prine on Illegal Smile -
"I have to confess, the song was not about smokin' dope. It was more about how, ever since I was a child, I've had this view of the world where I would find myself smiling at stuff nobody else was smiling at. But it was such a good anthem for dope smokers that I didn't want to stop every time I played it and make a disclaimer."
Prine is an American Original. I've seem him 7-8 times over his career; last was last year in Reno. He is still true to his roots. Never sold out.