Hazir: When travelling to the U.S., you are allowed to bring two cartons of cigarettes, no questions asked. I'm guessing there are restrictions on shipping mass quantities all at once but that doesn't seem like it would be a problem unless the person is purchasing quite a few cartons.
I know that I've shipped single cartons of cigarettes back to the states with no problems before.
Yes shipping large quantities are gonna get you in trouble for sure!
But if you only keep it small I think only the customs if they search the package and they see what's inside.
They are gonna tax it and let you pay the import duties.