Smoking drugs on tinfoil releases toxic fumeslike aluminum oxide and harmful chemicalsthat can damage the lungs, brain, and other organs, increasing the risk of overdose and long-term health problems
In a recent mouse model to investigate a synergistic effect of exposure to Cigarette Smoke (CS) in utero and during adolescence on lung function by Drummond et al, it was found that in utero exposure to CS induced significant lung function impairment
The evidence says otherwise, and so should tax policy
In addition, exceptions for mailing cigarettes and smokeless tobacco described in Publication 52, Hazardous, Restricted, and Perishable Mail , apply only to domestic and Army Post Office (APO) or Fleet Post Office (FPO) mailings, not to international mail