Good idea to stop young kids taking it up. I got off them 5 years ago with a vape, still use the vape now.
Don't know what the drug situation is in New Zealand, but here in the UK I would be more concerned about kids taking up hard drugs. However it don't hurt any to put some more advanced rules in place for smoking in the future. By what I've seen more younger people have already taken up vapes,so job already half done.