Your put up a good argument! Smoking being bad for you just like McDonald's, binge drinking, drugs, ect. but people still do it knowing it's bad for them! I don't usually tell people how bad it is, like you and Heather said, you obviously know it's bad. It's an addiction just like drugs and it's very hard to stop. Dieting is the same way for people, they know when they have to start just like smokers know when it's time to stop!