A relative of mine was mauled by his own English bull terrier. He was very badly injured. If he had done it to one of his children, that child would dead.
The dog was bought because the wife always loved them. They still have one and I refuse to visit.
I adore dogs. I have 2 rescues. Both small (one a tiny spaniel, probably my crossed with something) and an another than is a some sort of poodle Cross. She actually looked like a small sheep. Both have excellent recall, but Both only walked off lead if we are somewhere we can see all directions clearly and go back on the lead at any point we see anyone. Both are very timid so don't approach people. But we still take precautions. It's just how it is. If we are in a field and I don't have a clear view they gone on the lead. That's it.
That said, the vast majority of these attacks happen on private property. Not when out for a walk. And usually the dog has a history. One of the children that died from that wiki link, was 3 streets away. People would not walk down by the garden because of the dog. Everyone knew it was dangerous and even the man, in the family couldn't control it when it dragged him along. And yet they left a young chap in charge of a baby, with the dog in the garden the dog got in. The children shouldn't have been responsible for the baby, never mind baby and dog.
Very few of these attacks come out of the blue. The owners have them to intimate and no one does anything about an aggressive dog until it really injures or kills someone. That needs to change.
I would also love to see private dog rehoming stop. People who claim the 'rescued a dog' but actually bought it off FB, really annoy me. They have no clue to the history, just what the current owners says and fall for the 'oh change in work pattern means we need to rehome....but he is the perfect dog'. Its irresponsible on all parts.
I would bet money, this dog was bought in this way. Even if the new owner didn't know it had a history, the neighbours have reported it was known to be aggressive so obviously made an impression and the owner left her own son with it. What the fuck? A massive agressive dog, just been rehomed and you leave it in with at least one child? It should have been I the home at all.
And quite honestly, I do agree there's a certain type of person that's wants an aggressive dog or an aggressive intimidating looking dog. Loads of these cases, have huge back grounds where you can see the owner has encouraged this behaviour. Like the man who like to threaten women with his dog. His dog then killed his pregnant partner.