Do unhealthy people impact others or do you feel their lives are their own?

I forget where I heard or read this but someone was stating that people who live unhealthy lifestyles end up costing everyone in the long run because medical and insurance companies have to spend more money on them.

Whether it's an obese person with blood pressure or a smoker, there's people who feel that it's their life so they do what they want. But then there's people who feel that their insurance rates or going up because they feel that the insurance needs to stay in business and that person's costing them lots of money.

What are your thoughts on this? Do you feel that "It's my life I do what I want?" Or do you feel that unhealthy people should really be more responsible? My job's annually doing blood work on us now so and adding credits to people who don't smoke as an incentive.
Do unhealthy people impact others or do you feel their lives are their own?
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