Let's start with eliminating the dogs in the breed that are responsible for more human and animal death and injury than any other breed.
You know which breed and mix that is.
If private insurance companies would simply refuse homeowners' insurance to anyone with a pit, that would send a very strong message to these manhood-deficient knuckledraggers.
Yep...and change the liability laws so that victims may go after the breeders. Current the laws don't permit going after the purveyors of such dangerous beasts, and if the owner doesn't have a pot to pea in, they are left with massive medical bills.