Here is the text of an email that I sent the school.
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The primary duty that a school has is to turn out informed citizens who will try to maintain democracy. Despite your best efforts, you are apparently on the path to success with Kinnan Zaloom.
Unfortunately your headmaster has failed to learn the critical lesson that any organization populated by people will have failure modes, and a common failure mode is that those in authority will seek to use their authority inappropriately, and will also seek to assert more authority than they should have. This has been known for thousands of years, with famous examples including ancient Athens, the Roman Republic, and a plethora of dictatorships around the world today.
I am being generous in saying that your headmaster has failed to learn this lesson. In fact he seems to have learned it, but sees the path to petty dictatorship as something to emulate, not to fear. However one should never ascribe to malice and all that, so I will make the generous assumption that his actions came through incompetence.
But even making the generous assumption, it is clear that your headmaster is not the kind of person who should be put in a position where he can try to harm the future of children whose only crime is to think more clearly than he does. We need children to learn that authority is a necessary evil in a democratic society. Which lesson can best be learned in an environment where authority is exercised wisely enough that the "necessary" part of it becomes evident.
For the good of the children forced to suffer through your school, I sincerely hope that this fact is taken to heart and appropriate measures are taken to ensure that authority rests in more competent people going forward.