With all due respect.
There is no respectful reason to have the animal alive during that process. As keepers, we care for our animals, including our feeders that we want to make sure go as humanely as possible. When feeding a live pinky, and they swallow it live, yes it goes through a similar process, but the animal is much too young to slightly comprehend what is happening, and it's eyes are closed. This is a clear example of someone who enjoys watching snakes eat, to see the other animal suffer.
Also, snakes do constrict their prey for a reason, and doing something like this is dangerous and wrong. If someone did the same thing with a rat, it would be just as wrong and even more dangerous because the rat would probably bite the snake.