Maybe the state of California could do this ban (maybe they already have, for all I know). So many people have an anti-smoking attitude there that
they would be willing to make a citizen's arrest of a public smoker.
Seems like this ban could work in Scandinavia. When I was in Sweden
years ago, I did not see even 1 person smoking. Now, though, the
immigrant population has increased, so they may be real into smoking.
Other nations which I think could pull this off: Sikkim, Singapore,
how about Canada, don't know about the Pacific Islanders.