I wonder how you'd have reacted if Christine Blasey Ford's parents had said something like this about Kavanaugh's.
As for the girls, I think the school's point that it cannot sanction them for activities outside of school is ludicrous. The activities affected another member of the school, and for it to have the effect it did, the girls obviously had to have lied to members of the administration as they pressed forward with charges against the guy. Those lies are surely punishable.