This is so sad and I understand your anger totally.
It's so sad that children have been terribly hurt and it's not just the physical pain they and their families will have to deal with.
It's sad that people have seen the dog as a tool to breed an agressive, unpredictable animal.
It's sad that such a dog has then had an upbringing or environment that did nothing to change these tendencies, or, even worse, encouraged them.
It's sad that the owners of this dog are unlikely to ever be found.
It's sad that they will probably wait for the dust to settle and get another dog to bring up the same way.
It's sad that as a dog loving community we sometimes put our own freedom above the good of the dog as a species and the community we live in as a whole..... the constantly barking dog down the road isn't just a pain, it's barking for a reason.
It's fantastic that we have a place like this, where everyone, without exception, puts the needs of their animals first - what a shame we can't get the rest of the dog owners here too!!