These people, through their denial, set up obstacles to even attempt quitting and hence have very little chance of success. Those who successfully overcome denial progress to anger. We hear so many stories of how difficult it is to live with a recovering smoker. Your friends avoid you, your employer sends you home, sometimes permanently, and you are generally no fun to be with. Most smokers do successfully beat this stage.
Bargaining is probably the most dangerous stage in the effort to stop smoking.
Maybe I'll just smoke today, and quit again tomorrow. It may be months before these people even attempt to quit again. Depression usually follows once you successfully overcome bargaining without taking that first drag. For the first time you start to believe you may actually quit smoking. But instead of being overjoyed, you start to feel like you are giving up your best friend.