Can't say I'm surprised. I went to a music college in the 1980s and all the same stuff was rife. While I wasn't there as a teenager, I had friends who were and everyone knew all about the widespread abuse (though for some reason, we never called it that).
Unconventional artistic types and over the hill middle aged musicians as teachers. Hormone-filled teenagers subjected to insane amounts of stress and competition. Intense 1:1 mentoring relationships. Private lessons with closed doors . . .
Go figure.