Hackers and tourists unite this summer as hackers from around the world track themselves, and others, in NYC. Confused? Terrified? Read on...As part of a social experiment, attendees at a hacker conference in July will be issued badges with electronic tracking devices. Large displays will show in real-time where people go, with whom they associate, for how long and how often. The tracking technology, known as RFID, is fast becoming an unseen part of everyday......