Onhell, as always you raise some very good points which I disagree with [!--emo&
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Just kidding, I see your point and I think it's compelling.
I won't bother quoting your posts, but consider this a general reply to what you wrote.
The fact is that people who smoke do not just hurt themselves - they pollute the air with second hand smoke and make things disgusting for the rest of us. In Canada, they also represent a collosal drain on our health care system. Why should I have to pay my tax money to treat someone who knew what would happen if he did this to himself? There are people who deserve the hospital care far more.
Arguemnts that it's an issue of freedom don't stand up. Yes, smokers have the freedom to choose to smoke, but what about MY freedom to live my life free from the risk of inhaling tobacco smoke? What if someone liked to fire a gun randomly in the air - some interpretations of the law say it's ok because he's exercising his freedom to do that. But what if one of the bullets hits me? Why should I walk in fear, where is the freedom for me? (Yes, that's a bit of a leap, but you get the idea)
Do the same arguments carry over for other things like obesity? You bet. Fat people are a drain on the society and steps should be taken to solve the problem. Perhaps banning the consumption of fried food in public, like they've done with smoking. Ban all forms of advertising for Burger King and McDonald's, like they did with the tobacco companies, don't let people under a certain age buy junk food, etc.
Steps like these won't solve the problem (they didn't with smoking), but they'd be a step in the right direction.
I'm lucky enough to live in a province which has banned all smoking in any public places - i.e., coffee shops, bars, casinos, places of work, shopping malls, etc. Really the only place you can legally smoke now is in your own home, your car, or outside.
Remember - there is
freedom to (do what you want), and
freedom from (things that will hurt you). Both are essential in a democracy, for a man who fears is never free.