Ah, I get you now @Soothsayer1
I think not, really. Because these dogs typically change hands multiple times. Someone buys a dog from these gangs because they like the hyper muscled look or some other extreme feature or because they crop ears (an eg of illegal activity they still continue with even though the law prohibits it) where law abiding breeders do not. The buyers are not doing anything illegal, even if immoral imo. No one buying a dog with cropped ears really cares for the welfare of that dog and so the cycle continues. Maybe they are also involved in crime, maybe not.
There are then high instances of that dog being resold or given away, often with little regard to where it came from or went to. Pets4Homes, Gumtree etc. Sometimes several times. Sometimes ending up with an owner who understands the dog and sometimes not. But the trail back is well cold by then and a well meaning but perhaps ill informed family gets the dog and does not have the skills to see the signs of trouble in a deeply unstable dog. An eg is that the dog is unlikely by this stage to bark or growl as a warning which is what most people would recognise as a sign there is something wrong. By the time they get to this stage, they are likely to have learned barking or growling is (at best) ignored or (at worst) results in a thump to the head. So, now we have a large, unstable dog that never gives any obvious warning they are upset in a home that may not be able to realise that.
Breeding these kinds of dogs might be an indicator in some cases. But, as I say the breeding is going on under cover, behind closed doors, sometimes in multiple homes with puppies moved and spread out multiple times within their first 8 weeks.
I agree with the sentiment, what on earth is a very large and powerful dog who is still largely unknown to the owners having only been acquired a few weeks ago, doing in a tiny suburban garden with a small child. But all these cases involve a 'what on earth' moment, sadly.