Why not let the public decide. In my city we had a plebliscite on banning smoking in public places and close to 90% of people were for it. The city council then passed a smoking bi-law. Do whatever you want in your own home, but the effects of second-hand smoke is quite clear and it should not be present in public areas.

Cigarettes should be banned because of their negative impact on peoples health, but they won't be as so many people still use them. As cigarettes become less popular, a ban would be more practical, to prevent any further use of this harmful product.

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"Conservatives are not necessarily stupid, but most stupid people are conservatives." — John Stuart Mill