The FBI is rolling out 150 digital billboards in twenty cities across the country. The billboards will let the FBI highlight those people it is looking for the most: violent criminals, kidnap victims, missing kids, bank robbers, even terrorists, the FBI said in a release. And the billboards will be able to be updated largely in real-time - right after a crime is committed, a child is taken, or an attack is launched. The FBI said it tested its first billboard in the Philadelphia area in September, with crystal-clear images of 11 of its most violent fugitives on eight billboards and a 24-hour hotline for the public to call. The billboards paid quick public safety dividends. In October, two fugitives were captured as a direct result of the publicity, the FBI said. Chicago, Las Vegas, Los Angeles and Miami will be among those cities provided with the new billboards, along with Milwaukee and Philadelphia.The FBI said Atlanta, Cleveland, Indianapolis, Memphis and Minneapolis will also get the billboards, as will Akron, Ohio; Columbus, Ohio; Albuquerque, N.M.; El Paso, Texas; Des Moines, Iowa; Newark, N.J.; Wichita, Kan.; and the Florida cities of Tampa and Orlando. While this seems pretty cool, it makes you wonder how long it will take for someone to hack one or worse, shoot at it like so many signs you see on the roadside already.