[peterloo]

In Hong Kong -- 18

However, a minimum age helps nothing in stopping teens from buying tobacco. They may ask someone to buy the cigarette for them, or if they are tall enough, they can simply buy it themselves since nobody gonna check his identity card everytime they buy cigarette and the sales judge their age by their outlook only. Furthermore, some retailers choose to keep a blind eye to this type of activity in order to avoid offending their customers and hurt sales

So, although it may be a good suggestion, I'm afraid that Skybird's idea might not work. Education, might be better, but the overall effect is still low as the youngsters just take it as "propaganda" and dismiss them