I like the article here http://frank-davis.livejournal.com/7703.html from Frank Davis. It's a common sense, reasonable argument, with sound advice - isn't that what we want in any healthy debate.
The only cancerous thing about the smoking issue is the vitriol in which smokers are being described by those who are trying to make them feel abnormal because of their own fears, prejudices, and outright hatred. .. 'nuff said !