However, the use of such attention-grabbing tricks has been criticized by city officials as being distracting to drivers, and as a result, a number of cities have banned sign twirling. Some companies like Enlarge Media Group and Jet Media are able to offer human directionals as "sign walkers", a less distracting form of sign twirling. Further restrictions on sign walkers in Arizona caused Jet Media Promotions, the state's largest supplier of human billboards, to sue the city of Scottsdale. The company's owner then successfully campaigned for legislation that made it illegal for cities in Arizona to ban such advertising.