No one at my work places was ever aware of me smoking at all, since I didn't smoke at work. Although, when my tax preparer asked me if I smoked, and I told her I smoked a pipe, she gave me a big grin and said, "Of course!"
Same way I've known people for decades who never became aware that I was a Vietnam Veteran. I guess I look decidedly unmilitary, though I did pretty well aboard ship and on shore duties. When some find out, they look incredulous, or as if they think I'm joking. Apparently there is some stereotype of that that I don't fit. Boy, we were a wildly variegated bunch of volunteers. Every ethnicity, educational level, home region, and personality. We should have all been given degrees in sociology or psychological counseling.