"By planning ahead for carnivals, administrators can avert many of the problems that they pose to law enforcement. For most people, carnivals conjure up pleasant thoughts of fun and games, cotton candy, amusement rides, and side-shows. Law enforcement officers, on the other hand, often think of the dust and dirt, long hours, lost children, rowdy teens, intoxicated individuals, blaring music, and blinding lights. Their superiors find themselves concentrating on the costs of policing carnivals and the personnel shortages they cause. Despite the pressing problems they raise for law enforcement, carnivals have their place in American culture. Carnivals have been in existence since 1893 as an offshoot of the Chicago World's Fair. They have endured the last 100 years and will continue to do so. This article unveils the 'carnie's' world. It looks at the behind-the-scenes operations of owners and operators and suggests ways for law enforcement personnel to protect citizens, and themselves, from becoming victims on the midway."
FBI Law Enforcement Bulletin: http://www.fbi.gov/publications/leb/leb.htm
FBI Law Enforcement Bulletin (February 1997), v.66 no.2