Have to have ID to buy cigarettes. Case made. As an infant you have to have SSN. So yes, proof of citizenship must be provided, not a Driver's License since they are not proof of citizenship, just ones ability to drive. And high school/college students can buy a good fake from local crooks. If these people are caught by the Registrars, the must be prosecuted with 5 years in jail and a $50,000 fine. Then deported to their country of origin. Subversion shall not be permitted.