Joseph – No, the OP did not ask about giving food to someone who smokes. It was about giving tzedaka to someone who buys cigarettes. And that makes two out of two attempts to twist around a legitimate question into something so not what was asked.
I have been fortunate enough to distribute food, money and other things to people who need (as the middle man, not my funds). I would not think twice about giving shirts and food to poor people who smoke, we still have an obligation to supply them their needs. Would I give them money? Probably not. I refuse to supply someone with their cigarette money. I would pay a bill for them or give them store money to a store that does not sell cigarettes.
I have been responsible for supplying things to individuals who are poor because they and their husband embezzled money and he got arrested. The family was left with no assests and no income. I asked if there is a question on giving them things paid for with maaser money if the situation was self made and I was told there is no question.