One interesting thing about how this was designed, it for some reason doesn't get your location from your facebook profile. It uses your IP address, which led to hilarious results because while my facebook rightly says where I am, I was using a SOCKS proxy to access this in a different city and when it showed him looking at a map it showed the route to my SOCKS proxy instead of me.
I guess I'm safe and the crazy guy won't kill me :)
I don't think the Facebook API allows you to find your location (although it is possible to retrieve your Facebook location by scraping the Security page for your current login session (which displays your location)).
Also, the location data that is displayed on that page is kind of inaccurate (it says I'm in another state).