You need to read up on very important economic concept: http://en.wikipedia.org/wiki/Externalities
I did not suggest outlawing fast food. I suggested discouraging companinies from producing it and encouraging production/consumption of healthy food. It IS the responsibility of government to encourage "good" behaviour and make it easier for its citizens to make healthier choices.
I don't see a principal difference between lowering healthy food tax and upping junk food tax other than higher junk food tax will make it easier to fund health-care of obese :).
Don't forget that obesity is NOT an individual problem; it affects society as a whole. See the link above.
They are arresting people because they are breaking the law. My response is that this law needs to be changed.
Yeah, they took those away. While I am no expert on safety of either, I think FDA overreacted. There are more gentle ways to regulate possibly dangerous supplements.
Fit, healthy people have better stress coping mechanisms and I don't see anything bad in getting rid of obesity and smoking. I don't think we should outlaw free speech; quite the opposite - we should produce much more socialist drivel in hopes that your heart will not cope with high heart rate and that cortisol will make you fat. Maybe then beneficial reforms will be easier to realize.