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Parents Asked to Sign Waiver to Not Monitor Online Classes
First of all, any agreement like this is not enforceable. Agree or not agree. Either way, record and post any questionable teachings.
Teachers can not, absolutely, can not decide any policy or procedure and do not have any authority to issue personal waivers, agreements, or contracts.
Any teacher attempting to do so should be sued by a group of parents as a class action.
These actions are outside the scope of their professional responsibility and is personal negligence; they can and should be personally liable.
Once it starts costing them their paycheck, they will stop. We need to hit them hard in their pocketbook. And after that keep on hitting them until they can no longer do any damage. Financial destitution is a start.