it's difficult to educate human mindsets when they see a mirror as an attack which is why the mirror effect does not work well. denial is a human modus operandi, they do not see themselves in the behavior. it's also impractical to imagine humans will take note of their behavior and suddenly adjust. if they believe it is acceptable to behave that way - they will continue. that's why bullying is so excused. mass- market bullying is just "correction" of noncompliance and thus no one sees it as inappropriate. this is how naziism or any fasicst or authoritarian model takes hold. the only way to correct brainwashed behavior is to show it raw. the texting and unapologetic interaction - under no circumstances do you allow that to stand. bullies do not expect you to be stronger because they marked you from a checklist not from any real skill. they do not know how to be actually authoritative. most people are actors not leaders. they will only change behavior if it no longer fashionable to be a fucking fascists - but they don't think they are fascists. they believe they are correct, until they become afraid they are actually incorrect (right about now but not quiet yet), then they hide and double down and make even more catastrophic errors. only if forced to be accountable do they change... but they do not really believe it. usually it's just another facade to evade accountability.
removing the mirror is important. most do not even know it's a mirror.