Restaurant smoking bans don't just protect diners and staff from other people's smoke, they help stop young people becoming habitual smokers.
‘In 2001, Michael Siegel* and colleagues at Boston University surveyed 3834 Massachusetts youths, with follow-ups two and four years later. In towns where restaurants had no smoking bans or kept smoking areas, 9.8% had smoked over 100 cigarettes in their lifetimes, compared with 7.9% in towns with smoking bans.
Once the researchers corrected for factors such as whether their parents smoked, those in towns with bans were 35% less likely to be habitual smokers (Archives of Pediatric and Adolescent Medicine, vol 162, p 477).
Bans don't make teenagers less likely to try cigarettes, but seem to stop them making it a habit, perhaps due to less contact with smokers or because smoking seems less socially acceptable.’
The full article by Siegel is available free at the link. BTW Michael Siegel has a very active and interesting blogsite here. Via it I came to this interesting report on tobacco control in Canada – one of those countries most successful in encouraging less smoking.