There is a big difference between bad food additives, like MSG and PHO, and cigarettes. Cigarettes have for more carcinogens; they are far more addictive (nicotine is one of the most addictive chemicals); and they harm people around them.
You never heard of a 6 bag a day addiction to Bissli. Nor have you heard of the danger of just being near someone else eating too much Bissli, unlike 2nd hand smoke.