This is just horrifying, really. Preschool children? So a precocious youngster will just need to be "calmed down" a little; with drugs that have not been tested as to their longterm effects on small children.
Any guesses as to the "screening" guys? I bet it includes "so how do Mommy and Daddy discipline you?"; "does Daddy hunt with guns?"; "do Mommy and Daddy ever yell at each other?"
Pediatricians have already tried this; and folks have changed doctors because of it. When the liberals in public schools get involved, that will be another story altogether.
I think you have it pegged.