@NotFormer
Yeah, remember that this was in the early 70's, there weren't the kind of reporting mechanisms that there are now. And, I imagine that what he did in his own home was his business, and the school/school board couldn't do much about his behaviour toward uninvited and unwelcome people at his front door. Kids had way too much 'respect for elders' even when it was not warranted. Everyone wanted to believe that other parents were good people, and pretty much everyone had close encounters with wooden spoons when they didn't behave at home.
Teachers got away with all kinds of abusive crap toward students. My grade 7 teacher hated me because my family was JW, and whenever we had an assembly and the national anthem was played, I was usually allowed to stay outside the auditorium until it was finished, but on one occasion, the assembly started with an announcement and I was in the auditorium. Before I knew it the anthem was being played and I had been told to remain seated if everyone else was standing and singing. This particular teacher came behind me and grabbed me by the hair and forced me to my feet, and held me standing until it was over, but in the meantime some of my classmates saw what was happening and (in solidarity?) some of them sat down, knowing that she couldn't yank them to their feet by their hair like she was doing to me.
All that did to me was reinforce the Persecution Complex™ that the WTS had predicted would happen to Jesus' True Followers™