Most people do not have the time, focus or correct knowledge and attitude to keep an aggressive dog breed so that it is under control and safe. Locking them in a yard and/or leaving them alone drives them crazy, they get insane.
I have no sympathy for such dog owners who get into trouble over an agressive dog breed.
A few years ago a kid in Montpelier, VT went into a Wolf/Dog hybrids yard to get a ball that was accidentally thrown into the yard. The Wolf /hybrid promptly killed the kid in about a minute.
Aggressive breeds have no place being owned by people who do not have the knowledge,ability, time or space to dedicate to them, because they become very dangerous animals, accidents waiting to happen. An agressive dog breed is generally a one person dog, not a family dog like some romantically want them to be. They accept no one as an alpha except their master, without a fight to the death or near death.And even then they will test the Master for weakness from time to time. Most people make the mistake of thinking it is play, and then doggie thinks he is the alpha, thats when the hurtin' starts.
Females are generally less high strung but can be more dangerous than males when they come into heat or have puppies. They just have different kill triggers, and are more likely to drag home what they kill.
I am convinced that only ranchers , and people with big spreads and lots of time on their hands are capable of safely owning an aggressive dog breed.
They have no place in the hands of the ordinary 9-5 working stiff who spends an hour with the dog each day and throws down a little dog food every day.
There. That bifurcated line from your post says all that needs to be said.