How does Q finally figure out where Margo is?

Q follows up on a map on Omnicitionary (Radar's Wikipedia equivalent) with a plug-in that Radar created. He finds an entry on copyright infringement protection on maps. Sometimes cartographers created fake towns or "paper towns" that represented nowhere at all. When others picked up the locations, the creators knew their maps were forgeries. Algoe, New York was one such paper town. But when Q looks up Algoe, he finds an edit on the entry that says that the population of Agloe will be one until May 29th, at noon. The capitalization is haphazard, which signals Margo.