TeenScreen is used in 43 states in public schools, private schools, and in a huge amount of colleges.
All that being said, I'd be madder than a wet hen if this had happened (or does happen) to my children. This test is apparently VERY popular at major universities where parental consent is not an issue
I was taught t hat tests like this cannot diagnose. They can suggest diagnoses. What they do is compare patterns of responses to responses made by people with “known” diagnoses. But the leap from, “A lot of your answers were similar to those made by a person who died from complications of anorexia nervosa,” to “You are probably going to get anorexia nervosa and die from it,” would require a BUNCH more data than is available, and even then would be dubious.