Actually, the most dangerous thing you can do is to be born. It turns out that numerous independent studies have shown that 100% of the people who are born die at some point in the future.
The thing I like about smokers is that we can tax them without their being able to do anything about it. It's a democracy, so since us non-smokers are a large majority, we win. As a democrat, I'm usually on the other side of that particular equation. They also can't easily quit, so the rest of us take advantage of it like drug pushers, raising the prices they pay for their drug with taxes, and then, in a brilliantly sadistic stroke, use that tax money to advertise against smoking.