Mexico City’s Mayor Miguel Angel Mancera is handing out plastic whistles. A half-million of them. At three bucks a pop, he’s hoping that women will use the whistles to scare off harassers on the packed public transportation system. When the plan was announced this summer, it received a flurry of scathing criticism and mocking memes on social media. But city officials are moving forward and have been handing out the whistles by the thousands at subway and bus stops. […] So far, the critics of the whistle plan have been making the most noise. Since he began handing out the...