Although it seems unfair and outdated, breed-specific laws continue to exist in the United States and across the globe in an effort to reduce the number of dangerous dogs. The laws are extremely difficult and costly to enforce, but many communities continue to outlaw certain breeds they deem "threatening." Organizations such as the ASPCA and the Humane Society are completely against them, stating that there is no evidence that communities are safer because of these laws. Plus, the United States Centers for Disease Control attests that inaccurate dog-bite data makes it near impossible to identify specific breeds. Still, many breeds — particularly Pit Bulls and Fila Brasilieros — suffer from negative reputations. Here are 12 of the most commonly banned dog breeds in the world.