I spoke from experience, at my junior high school, a kid who was bullied mercilessly shot two of his tormentors and then himself. The administration overlooked the bullying issue at our school and has, ever since, worked very hard to pretend that such a thing never happened, despite the kid getting "swirlies" in toilets that had yet to be flushed. I heard the shots, watched the news crew vans pull up (our first clue that something had gone down), and so forth.

It's not a myth.