I'm Dimaggio's hit streak. How did the teacher handle it wrong? Didn't he/she (sorry I didn't even notice the gender) the student refused and the teacher called for security, what else are they supposed to do. I"ll promise you the only reasons your mom could get away with that sort of thing is that she did it forever and the administrators are probably just as scared to eff with her as the kids are, AND she was also dealing with kids NOBODY ELSE WANTED, so if the administration punished her in any way she walks and they have to look for somebody else to send into the demilitarized zone (except for the likelihood of military stuff).
When I taught in the public schools of OK the principals still held power over the kids but the teachers had one thing to use, bluff and you knew not to push it too far because if the kids ever figured out how little power you really had then you really were up ****e creek. Teachers have to have the authority to run their classrooms, but to be honest so many good teachers have left the profession because of the crap we're talking about the ones who have come in their place are hit and miss, some are really good and dedicated, others love the position and the paycheck and couldn't teach a dog how to bark. When my kids were in school since I had taught there I knew which teachers were good and just trying to teach (and I supported them) and which ones were worthless (and they knew not to eff with me). I've defended my kids against punishments when I knew the teachers were wrong and I have supported them being punished when I knew the teachers were right. Had I not taught there previously and known all of them it would have been a lot more difficult.
You are correct. My wife is scared of her, her mom is scared of her. She ask if my mom was psychotic. I said, yes when you piss her off, even my dad won't say anything. Her whole family, just the females, when angry, you think Martin Lawrence, Eddie Murphy or George Carlin have filthy mouths, my aunts would make them look like child's play.
Imagine your rotten ass kid getting in a verbal fight with my mom, she would have him/her crying 5 minutes or less and then dare them to tell their parents and yes she has done it before to them and on tape and the parents wanted her remove for disrespecting them until she gave the tape of their rotten kid doing bad things in class. My mom is smart, she has blackmail material before she goes into Drill Sergeant mode. She said the art of knowing when to talk is paramount in teaching. You know your limits and how you use them and I bet you think the same thing.