If people are allowed to own animals that are highly dangerous if trained accordingly, they should assume full responsibility if their animal goes apeshit. If the dog murders a three year old, the dog owner is held accountable. That's the responsibility of owning a killing machine.
In science, a theory isn't something that is false. A theory is a statement accompanied with multiple forms of evidence. Otherwise, it's just something that someone thinks about. If you have evidence, then it's what we call a theory. The theory of Evolution has plenty of evidence. Creationism? Not.