Foursquare: Como me tornei um cyberstalker

Sugestão de leitura (em inglês): o texto "How I became a Foursquare cyberstalker", de Leo Hickman, publicado no Guardian. O destaque do editor ficou assim: "It's the coolest social networking tool in the world. But is the geo-location app Foursquare a stalker's dream? Just how easy it is to uncover the intimate details of a complete stranger's life?"