Brazilian police reportedly have a warning for those visiting for the World Cup this summer: If you are robbed, don’t scream. The instruction comes in a pamphlet advising visitors on how to stay safe that will be distributed by Brazilian embassies and consulates, according to a report. “Do not react, scream or argue,” the brochure says. The advice is meant to keep tourists from provoking robbers into further violence once a robbery is underway, as robberies that end in murder are becoming increasingly common. It is also recommended that visitors avoid showing off valuable objects, be careful at night, avoid...