I taught a year in the Boston Public Schools system from 2019 to Spring of 2020 and realized that there are some students whose entire reason for being in class is to disrupt the education of others.
I was teaching a business course to students through a Junior Achievement-like program as a way of giving back to community kids, and one time a particular group of girls became so disruptive one time (consistently, If I'm being honest) it forced me to address them head-on. They became aggressive and profane in the worst way imaginable. These are students who have no structure in their homes are allowed to speak to adults as though they are peers. There was nothing I could say or do to help teens that are so lost. It's wasted energy --learning energy taken away from the students interested in learning the subject material.