Good parry of my attempt to impose unsought therapeutic environment upon you
. I was attempting some analogue of conversation such as:
Therapist: What uncomfortable feelings were you experiencing when you kicked the other student in the head and took his lunch.
Client: I was feeling hungry for some hot chips, so I saw that he had some hot chips, so I took his hot chips.
A classroom is a social system. Human social systems function largely in relative, rather than absolute, terms. So, for example, even in an A.P. 12th grade mathematics classroom in a very affluent, well regarded University town district, there will be one kid who is the class clown and disrupts the process for a couple minutes.
It is also true that humans fairly quickly adjust to new circumstances. So, for instance, because I have become so acclimated to dealing with urban youth, I recently boarded a crowded city bus, and while acting on auto-pilot, instead of pointedly avoiding a VERY ominous looking youth of about 19, I directly asked him to move his feet, so that I could share his seat, and he did as I requested. Then a second later, I realized what I had just done. (I would like to note that in general the bus riders of Detroit are more polite about offering me seating precedence as an older female than the bus riders in more affluent communities.)
One of the 7th grade girls I tutor was suspended from school this week for kicking another student in the head. This was no more remarkable to me than the sound of shelling on an episode of M.A.S.H. There was a particularly terrible class of 6th graders at one of the schools last year. Instead of the usual 3 boys (or 2 boys and 1 girl) who are out of control in any given group of 28, there were 8 of them. Their classroom teacher, who looked like somebody you would more likely encounter on a guided bird-watching tour, was on her last year before retirement. So, she would say things to me like "Thanks for dealing with my assholes yesterday." on the occasions I allowed myself into being duped into covering for her. That's why it struck me kind of odd or fake that the teacher sounded like she was crying on that audio-link you uploaded.
If somebody started pounding on the doors of the library shouting something like "Hey Martell, get over here, because I am going to break your fucking legs.", first I would judge whether the tone was just indicative of Branando, in which case I would go to the door myself and tell the kid to beat it. If the threat seemed legit in the moment threatening, I would call the office, and they would likely send the security guard to deal with the problem. If the security guard couldn't deal, or it was otherwise warranted, the police would be summoned. If for some reason I was in a situation in which the administration was not inclined to summon or enact appropriate security measures, then I would call the police myself. If, for some reason, such as being tranported in time machine back to the Wild West, I was attempting to teach in an entirely unregulated environment, I suppose I would have to arm myself. In no circumstance would I think having a nervous breakdown and crying in a public forum would be a helpful measure.
I am still probably not explaining very well, but it is my judgment that this is a complex systems problem, not a problem that can be appropriately addressed with "just the facts" or any linear new rule of order. So, instead of a graph, I would refer you to Zola's masterful novel "Germinal" which explores the social effects on members of both the lower and upper class when the economic system of a mining town in 19th century France fails.