The target keeps changing. In Post 91 you NOW say that a direct confrontation was prohibited by your Dojo Cho. You never mentioned that before, but said the decision to allow him to continue training in your school was that of the Dojo Cho. You did say that he gave each of you instructions to control your class and you did not mention any restrictions in that regard. That changes the tenor of the situation and I would have made other suggestions to you, and perhaps others would have as well. How can you teach a class safely without the authority to confront a student who is doing something dangerous for example? Did you truly mean that any direct confrontation with this student was expressly prohibited, or were you just speaking in a shorthand way? I thought this had been put to bed. If I have misunderstood you, please call me on it.
Ease up a bit! I got the distinct impression from his early posts that his dojo-cho was not going to let him go as far as he wanted.