I and my kids have gone to school in those states all of our lives. I've never heard of anyone being disciplined the way he says is allowed.
Back in the day (decades ago), I went to an all boys Catholic high school, and I definitely saw teachers (all male) use physical punishment on students (all male). It was a different environment...tougher. And yet, I can count the "corporal punishment" instances on one hand (hard punch to the arm of a smart ass student, throwing a book at a student's head who was sleeping in class, grabbing a shirt/backpack and pulling, squeezing a hand to cause pain). In Catholic elementary school, I received a firm swat to my open palm with a ruler from a nun (as did everyone else in the class for a group offense). No one was ever formally beaten. He describes something that I've just never see happen, even in schools famous for such discipline. I can't imagine it happening in a public school. Anyone else ever see what that guy describes as being allowed?