If someone has a lot of time, there is a google maps feature that allows you to enter all the members of a particular group on a world wide map that represents everyone with little pins.
I could see how this would make some uncomfortable, although only the screen name pops up. If you are really paranoid you could see the Google World Order using this to map enemies and eliminate them.
None the less, it's pretty cool to see it in action.
I'm at the formerly traddie hot spot in southern Ohio, living among the ruins.