We could start a whole 'nother thread on the subject of spanking. I spanked my children. I also HIT them some. Hitting them out of anger is a very bad way to parent. It only teaches them to hit as a response to anger and that parents are scary and unpredictable beings. It never got the correct response from my first son, but the second son, yes, it worked. For him, he knew he had done wrong and was actually kind of "relieved" to be briefly spanked because he knew that this set the balance back to normal. When he had done something wrong, he knew that it must be righted. So, the spanking was a way of paying the debt, and then balance was restored and he felt "clean" again. As long as I did not berate him endlessly afterward. What's done is done and to pile on shame afterward is a mistake
The older child, the AS child, did not buy into the idea that he had done something wrong in the first place. Therefore, spanking him was not bringing things back into balance, but putting them OUT of balance. He felt wronged, and was then duty bound to fight back against the perceived injustice.
So, it's not always the best choice, but I do beleive that an occasional short swat to get a child's attention is effective.