a person close to me had a similar experience in high school. she attempted suicide, and afterwards the school wanted nothing to do with her. they didn't let her go on the class trip. they say they are protecting the other students. clearly fear of litigation is a factor. but I also think the institutions don't want "people like that" in their culture. they would prefer to continue believing their institution is made of hard working positive people. lack of empathy is the ultimate cause.