Ban junk-food advertising?

Londoner Nancy Hayden-Smith, a full-time mother of four children, knows the power of advertising. Although she strictly limits her family's visits to fast-food restaurants, her children still pick up on media signals. “My son was just saying on the bus over here, „Oh, Mummy, I like McDonalds'“ says Hayden-Smith, out shopping with her 4-year-old at a city mall. “There must have been an advertisemen...