A quick google search shows that the first hit on this term - community guns - comes from Boston in 2006, another comes from Jacksonville in 2007 and links to the article above.
In each case they want to convince the reader (the public) that criminals across America, especially in the decaying inner-cities, are stashing these guns in designated places and are being made available to all who know how to get them; now, would somebody tell me why any sane thief would risk getting his ass blown away by an awakened homeowner in the middle of the night while the crook is looking for guns to rob when he could just walk down the street and clean out these abandoned stashes?
Semper Fi
An Old Man