A couple troublemakers can cause a lot of trouble on a site like Wikipedia, but the 'Wikipedia Recent Changes Map' aims to remedy that. Though Wikipedia doesn't track the location of its registered users, unregistered editors have their IP address recorded at the time of edit. Since IP addresses can be traced to a geolocation, you can theoretically create a live map of unregistered editors. Stephen LaPorte and Mahmoud Hashemi have done exactly that with their recent changes map.
In real-time, you can watch as unregistered users from around the world make edits. Translucent-colored dots pop up as each edit is submitted. Hovering over a dot reveals the name of the article being altered at that location. Alternatively, a scrolling list of changes is populated below the map if you prefer a text-based view.