Product placement has been a staple of big-budget Hollywood films ever since E.T. followed a trail of name-brand candy into Elliot’s bedroom. But a coalition of activist groups and health organizations is demanding that the film industry draw the line at in-film cigarette advertising. “The groups want the industry to encourage the Motion Picture Association of America to impose an R rating on films that include smoking, except those that ‘clearly and unambiguously’ reflect tobacco’s dangers.”