Around here if the cops even get a whif of something like this happening, they stop it before it can get organized. Too many times these things turn into street, or even town, "takeovers". Street racing, drifting, blocking roads have become problems. Almost everything now
has to be an organized/authorized "car show". The "young guns" with the tuners, and/or the new Challenger/Camaro/Mustang crowd are the main trouble makers. People with new $50-100K cars just out to cause trouble.