Smokers clearly realise it slowly kills them, some sooner than others, but surely the government could start giving away free patches or something or have little machines located in various places where you can put say 50p in and get a patch or gum.
At college we have 5-10 minute breaks in the middle of 2hour lessons, and the amount of times people walk in late only to come back in with the stench of cigarette smoke is appalling.