patur: An ani smoking in of its self is not proof of anything- period. If you look at my original statement i was responding this line “first of all, if u can afford to smoke, then you can not have the chutzpah to go round collecting.”
while you might have found that using a quick google search, this is not how we determine halacha. I said “There is no halacha saying you have to do a background check when some ani asks you for a couple bucks on the street.” That is true. You are referring to communal funds and or a “chiuv” for a private citizen to give- for that the halacha is different. If you choose to buy one less sprite bottle at the gas station in order to give a poor person who smokes a dollar- there is no halacha against this. Also, what ani who smokes says he does not need food? Additionally, rov moshe says that if someone was rich and they squandered all their money away (lets say in vegas) one must still give him tzedaka since he needs this money now.
Obviously there are limits, to each his own, but it certainty would not hurt ones middos to give a dollar to someone who asks even if they smoke if they can afford to. To count this $1 towards ones maaser money though is not what I am discussing.