Troy, Michigan couldn't afford to keep its library open, so it scheduled a vote for a tax increase. A strong anti-tax group waged a dominating campaign against it. Posing as a political group, an outside advertising agency posted signs around town that said, "Vote to close Troy library Aug 2, book burning party Aug 5." We invited everyone to our Facebook page, adding Twitter, Foursquare, want ads, flyers and more to drive engagement.