@monkey123
They don't actually brainwash him.
They could potentially just prevent him from ever coming in contact with any of the female classmates by having male classmates guarding or females be in pairs or bigger.
And if they do test his powers, they could supervise him and the subjects.
Which is what I meant that 'it's possible, but it would be an annoying process'
I mean, the absolute the worst thing they could was
step 1) Anger him
Step 2) Alienate him from everyone he might feel some kinship with
step 3) Leave him mostly alone, now angry or disappointed pretty much every other human, thus seriously motivated to actually go against him