Indianapolis Mayor Bart Peterson wants to ban new billboards. All of them. "There's not a problem with billboards per se," the mayor said. "They are a legitimate and important form of advertising. There can be a point at which there are plain just too many of them." But it isn't clear how many is "too many." The city says it doesn't know exactly how many billboards there are now. Peterson wants a six-month ban while the city counts them.