This is a great topic, seemingly lost. Last year at Reno, my son head snapped his opponent in a sprawl. I have always taught him that you post the head to the bottom of the mat. The official, from California cautioned him for unsportsmanlike conduct and told me and him that you couldn’t snap the head or be physical. I agree, some refs, especially on a kids level will not let the kids wrestle physical. Didn't say dirty, but physical.