Billboard of Shame

A mobile billboard on wheels that could be parked next to the trashiest most derelict piece of property in town that would display the name of the property-owner in huge sans-serif font, lit up at night. After the property mysteriously and spontaneously cleans itself up, the trailer could move on to the next trashiest site and so forth.

P.S.: I suppose it's semi-baked *or at least the dough is there* because I have heard of a private individual doing this in Los Angeles with good effect (by renting an existing billboard), but I propose a purpose-built reuseable mobile-trailer version; A city-sponsored public works ad campaign. It might actually save tax money in the long run due to less city cleanups of garbage infestations.