"Some dogs are a real nightmare. Almost always the owners fault not the dog."
Why don't we let people keep tigers in their homes? I'm sure if one attacked you it would be the owners fault, not the tigers natural intuition to see you as food. And if it just happened to bite and slap around someones dog with its 8 inch paws whilst out for a walk it would be "just playing".
People need to wise up, the only reason we have dogs now is because in ancient times people found they could be trained for war, protection, work. But those were different times, life was cheap. The "bad" owners people allude to are the sort of people who kept dog breeds alive, decent people, with no need of war, protection or to scare sheep would have eradicated them centuries ago along with Bears and Wolves.
You're right you can't blame the dogs, its their natual instinct to attack and kill indiscriminately, they lack the intelligence to over come this natural urge, the only real solution to dog violence apart from extermination is to put them all into safari parks with all the other animals.
...preferebly in with the tigers.