Way off our geographical radar, but this has such obvious local application. Tel Aviv "creative co-op" VeeCee has launched a campaign to bring down inflated rents by infesting overpriced neighborhoods with cardboard prostitutes. "More whores in your neighborhood = lower rent prices." Flickr set here, "making of" video here. Hard to argue with the premise, though one could insert a caveat about the quality of the whores, plus context. Nominally "real" but essentially cardboard whores certainly haven't hurt rents in the Meatpacking District.