I've always heard that it's difficult to quit smoking even if you want to. Here's my suggestion: spend a voluntary night in hospital between two heavy smokers who look like skin and bones and are receiving treatment for severe cancer. Have their ex-wives walk in and let them chat for hours about their smoking habits, the surgery they already had, the size and looks of ulcers and the joys of chemotherapy. Have the smokers moan and groan from pain all night long.
I swear this would be much more effective than the warnings they put on cigarettes nowadays. And hospitals could earn some extra money buy offering this as a special to smokers who want to quit.
This has actually happened to me when I got my tonsils out. Unfortunately I didn't smoke in the first place.