Caution: Cigarette Smoking May be Hazardous to Your Health (1966–1970)
Warning: The Surgeon General Has Determined that Cigarette Smoking is Dangerous to Your Health (1970–1985)
SURGEON GENERAL'S WARNING: Smoking Causes Lung Cancer, Heart Disease, Emphysema, And May Complicate Pregnancy. (1985–)
SURGEON GENERAL'S WARNING: Quitting Smoking Now Greatly Reduces Serious Risks to Your Health. (1985–)
SURGEON GENERAL'S WARNING: Smoking By Pregnant Women May Result in Fetal Injury, Premature Birth, And Low Birth Weight. (1985–)
SURGEON GENERAL'S WARNING: Cigarette Smoke Contains Carbon Monoxide. (1985–)
Tobacco packaging warning messages - Wikipedia, the free encyclopedia
Doesn't seem like that big of a secret and since nobody has anything else to add it seems like the argument is over and people are solely responsible for what they ingest.