regardless of whether this is what he meant, by your reply you seem to suggest that your confused by this notion of allowing smoking but not wanting the home to smell like illegal substances, therefor making the contents of the home smell like illegal substances, as well as simply smelling of anything?
OMG, that's exactly what I was going to say! Put the curtain around you to make sure any little bit of smoke that does come in from the wind is blocked out. Heh. No curtains? Just stick your head way out!