Believe it or not, the town where this happened is only about 20 miles from where I live. (The world is an unbelievably small place at times.) If it's any consolation, the courts and juries have little tolerance for this kind of thing here. A San Francisco couple were both sent to prison after their unleashed dog mauled someone a while back while they stood by and did nothing.
Unfortunately, there's never a shortage of irresponsible pet owners. I always thought they should license pet owners themselves before they can own a pet like a dog (like getting a driver's license before being allowed to drive a car). That hurdle would discourage a fair number of irresponsible people before they ever got a pet. I volunteer with the
German Shepherd Rescue of Northern California and we see far too many neglected and sometimes abused dogs. These all come from people who never should have owned a dog in the first place which is basically the root of the problem. I'd like to think this could change some day.