Pit Bull meaning

"Pit Bull is a term used to describe several breeds of dogs with similar physical characteristics. The American Pit Bull Terrier and the American Staffordshire Terrier commonly fall under the category of "pit bull." There are several other breeds that can fall under the category of pit bull, including: the Argentine Dogo, the English Bull Terrier, the American Bulldog, and the Perro de Presa Canario. These breeds are usually not included by breed name in any Breed Specific Legislation (see below), but are usually included because of a broad definition and confusion as to what a pit bull actually is. All of these breeds as well as many others (including Great Danes, Newfoundlands and Rottweilers) are members of the Molosser family of dog breeds."

How in the world can people ban a dog that isn't a real breed?