My wife and I aren't smokers.. but unfortunately, the people who moved in downstairs from us have two teenage kids who smoke... and they have a large "posse" of friends. all who all smoke as well. The parents run a local business and are usually out till late at night leaving the teens the run of the place. And so.. every freakin weekend evening, There are at least 10 teens down there smoking like chimneys to the point that our entire upstairs appartment smells like an ash tray and we have to open our windows to let the freezing cold air in just so we won't die of seccond hand smoke !!
I can't imagine the damage they're doing to their lungs and the walls of the apartment down there. There's literally so much smoke that I doubt there's much oxygen down there for their brain cells to use.