The Mexico City police department is no longer satisfied with their normal routine of stopping motorists on the street hoping to hook un pez gordo for a hefty mordida. Now they are inviting you to be an active participant in your own shakedown by asking you to send them your GPS coordinates from your smartphone!
I am not making this up.
Please don't think, yeah yeah, ha ha, it is actually a good idea. As an ex-Chilango, I can assure you that letting the cops know (a) that you have a smartphone, and (b) where you got your shoes, is a very bad idea indeed.