Somehow, people who believe in physical punishment justify that if it works it is okay. If I put a shock device on my husband or he had to allow me to slap him– heck probably a citronella spray too, I bet you I could correct a lot of his behaviors pdq. It wouldn't even have to be a strong shock. And even though he DOES understand right and wrong, the damage to the relationship if I had that power to make him wear it or allow me to give him a slap. Ditto on children. But humans are able to comprehend right, wrong, and evaluate the relationship. Let's not mix them up with dogs.
Andrea has it utterly right on what behaviorists have always said-- understanding what is allowed and how their humans respond is not the same as right or wrong. It really is not. Just as a dog that you call "guilty looking" isn't FEELING guilty. They are demonstrating awareness of what your response to pee on the floor or torn up cushions is going to be. That is not the same thing as guilt.
Dogs live in the now for the most part. Right or wrong? No. I care about the human response if I steal their sandwich or I don't care so much, maybe. I could leave a steak on the coffee table and my rotties and chows would not touch because they learned leave it. My basenjis don't need a steak-- I could leave a piece of lettuce and they'd take it. Has nothing to do with food value, it has to do with their acceptance of my role or right to tell them no. Although the human alpha stuff is fortunately slowly being buried, dogs do comprehend relationships with humans and each other.
Which leads us to my point and really only one. More than an utterly obedient dog, more than a dog I can brag about how well trained, I want a relationship with my dogs. I want a relationship of trust. I want whatever I manage to get them to do to be because of that relationship, not because they ever experience any sort of physical punishment. Let us not play with words (and for the record I have a degree in psychology so yeah I comprehend behaviorism and all the terms). Ignoring a dog for a few minutes until it puts all four feet on the ground (ie learns not to jump up on people) or as part of refusing to let the dog demand attention or placing a dog on a leash and putting in a down position until they settle is not the same type of physical response as hitting, shocking or even using a rolled newspaper. You can call it any technical word you want, but when the result is pain, fear of pain or anxiety about your response, the goal is domination through intimidation. You don't have to inflict actual pain to do that. And at the end of the day, I want my dogs to do what I want because I have shown them, supervised them, let them know when they do something I don't like and because they know that I will back up what I say. If I call the dogs and they don't come, I GO GET THEM, promptly without repeat calling. If I say OFF THE BED, they get off. Not because they know the next response is to yell or hit, but because the next response is to pick their furry butt up and put out of the room. You can train dogs to do things with the minimal response. Resorting to hitting, shocking, spraying, rolled newspapers, etc is rarely necessary. And at the end of the day, I have preserved a relationship with my dogs that is more akin to a partnership than a drill sergeant and new recruit.
And for things that I cannot get compliance on, like Arwen and all and any trash cans, I accept limitations. She isn't going to die if she dumps the trash, I am not going to die, and so I can make them so heavy she can't dump or can't dump easily. Could I put a shock collar on her and stop it? ABSOLUTELY. It's a perfect truly effective use of one. The dog doesn't even associate YOU with the shock. I would never do it. If my older Rottie dumped the trash cans, I would have willingly used one because unlike Arwen who simply looks for tissues and food, Dax ate EVERYTHING and ended up at the ER vet over it once. Fortunately a different design stopped her, unlike Arwen who will dump over any container she can't open. I would absolutely advise someone who has a rock eater or a dog who goes after bees or snakes to consider an aversion type collar because they are dealing with life and death and they can use the collar without the dog connecting the response to the person generally.
But again, the bottom line is I truly believe in training the kindest way possible. I will choose less effective over more kind in any situation other than life threatening ones every time. But I have to be honest, the research supports over and over and over and over that while you can get accurate results with physical punishment, you get them just as solid and accurate using clickers and praise. Why would anyone choose the other is what I don't understand.