[fnord123]

>On a more philosophical note, are we really OK with the government reaching this far into our personal lives?

It's not reaching into your personal life. It's reaching into businesses to stop them from selling damaging and highly addictive products. Banning tobacco would be optimal but not feasible since too many people are already addicted.

[scriptkiddy]

So are you in favor of banning fast food and alcohol as well?

[fnord123]

None of these, including smoking, are possible to ban due to the addictive qualities. But indeed there should be initiatives to wean people off them and reduce the damage they do.