I don't smoke while flying no for exactly the reason you stated and... the boss wouldn't allow it. I do smoke before and after though, just a one-hitter bowl before though as I don't like to be stoned while flying, just a calm buzz is all I need to keep me focused, that and a thermos full of good coffee!
Sorry about that Riddick! Yes the Piper Super Cub N907AK and the Boeing 707 are both courtesy of Mr. Fury there... well accomplished artist in and out of the simulator!
Now, I think I'll go shoot some ILS approaches in the sim, instead of burning 300 dollars worth of gas ever hour in the real world to do it!