I think there should be another opengeoficiton site (earth.opengeofiction.net?) that is the real planet earth but includes only natural features. That way, we can colonise our actual earth. The borders of countries will be maintained but can be altered by virtual wars. Country names would be the same as their real world equivalent but people are encouraged to change them after getting posession of the territory.
This would be a lot more fun then OpenGeoFiction; more of alternate universe. It would also be interesting to visit your creations in real life.