Singapore gum ban (1992)
Singapore banned the import and sale of chewing gum, framing it as a cleanliness measure. Smuggling carried fines and prison terms, and the ban became the emblem of Singapore's 'Fine City' reputation.
Gum vanished from shops within months; the ban was enforced at the border.
Partially relaxed in 2004 for therapeutic gums sold by prescription. It remains a global shorthand for Singapore's rule-heavy public conduct model.
The bus conduct rules apply the same template: minor public misbehaviour managed through formal penalties rather than informal social pressure.
