This happened when I was in school in the late 1980s too. Back then the school was gifted an encyclopaedia set, a rather expensive thing at the time. There was no internet, books was where you got your info. Well, a singular black woman who didn't even have a kid at the school was allowed full access. She tore out everything she deemed unacceptable, mainly anything to do with the slave trade apart from white people atrocities, tore out anything that was to do with white people of note that she had heard of. She basically was left to destroy entire volumes of these hugely expensive books. They were next to useless after that.

Lefties are going to left.