I went to a Catholic grade school & a Jesuit run high school. Both all white and middle class. I can assure you Sister Mary Ruler and Father Take No Crap didn't care one bit what your socioeconomic background was when you messed up and got called to the mast. If your parents found out it got worse.
Perhaps Cheech and Chong had similar memories.
” If your parents found out it got worse.”
The source of the ‘elephant in the room’ - when the angry parents show up, as though their spawn is part of their gang instead of their child.

Problem is that when the libs started taking over education and other aspects of life, if the kid got in trouble at school, the parents started to come after the school and principals with lawyers. After many years of that, teachers are no longer allowed to discipline. We had strong discipline in our school in the 60s and 70s. There were no/few problems.
“Father Take No Crap” sounds like a cool character.
He would probably spit in disgust at what is going on.