Lots of people tie out or kennel dogs when they can’t personally supervise them, are at work or whatever- it is a responsible thing to do so the dog doesn’t get in trouble; which normally works fine. Of course some people kennel or tie and neglect a dog but there is always a certain number of irresponsible people, those kind of people would neglect dogs no matter how they kept them.
We don’t know what kind of pet owner this lady is but I don’t agree that tying one out or kenneling one is a bad thing- depends on how it is done. I imagine if the dog had the run of the entire back yard the officer would likely have shot it so don’t see how her tying her dog up was part of this at all.
Lots of people leave their keys in their cars. Just because "lots of people" do something doesn't automatically mean it's responsible. "Lots of people," may even get away with leaving a dog tied up, their doors unlocked or their keys in the car and never have a problem with it. That still doesn't mean it's the smartest, most prudent or responsible thing to do.
"...it is a responsible thing to do so the dog doesn’t get in trouble; which normally works fine."
How is it more responsible than leaving the animal inside? If you say that the dog might chew things, tear up the house, etc. then I'd refer you back to my contention that the person has not invested the time to train and discipline the dog that they should.
"We don’t know what kind of pet owner this lady is but I don’t agree that tying one out or kenneling one is a bad thing- depends on how it is done."
By my criterion, I do know...she's an irresponsible pet owner. I've had dogs my whole life, and lived in all kind of conditions from a little house on the prairie in White City, Kansas where I could stand on my roof and see nothing but cornfields, to a little apartment in downtown Seoul, and lots of places in between. I've never had the need to tie a dog up outside, unsupervised. I've certainly had to make some sacrifices in my personal life, my daily routine and my social activities, but those go with the territory of responsible dog ownership. If somebody isn't up to it, they shouldn't own a dog. Too many people buy a dog as a fashion or fancy and fail to research and grasp the full implications of what will be required of them. The dogs pay the price.
Again, I guess I need to repeat it here because nobody seems to pay attention to the 30 times I've already stated as much on this thread, this in no way absolves the officer for tasing the dog, but more care could have been taken on the lady's part to protect it.