Good article. Thanks.
While smoking can cause various physical impairment, there is another "illness" I see in many people - that of frustration and anger at others for their perceived lifestyles.
People stand a better chance of living a long and healthy life if they calm down and accept others as they are with the hope that one day that person will seek out change on their own decision.
A good way to calm down is to check out why the anger occurs and do some self examination.
There is no more wasted emotion than uninvited anger at another person - especially a stranger.
If you really want to help, point those you are concerned about to positive information, offer support, stand back and let them make their own way.
Nagging never bought a person any satisfaction!