If that’s the claimed concern, why do the students have any internet access then? Unsavory information is only a single google search and click away - while that doesn’t have the “satanic panic” aspect of LLMs, it’s the exact same information.
I encourage you to try and access the internet through a school's firewall. If you think Fable restricts you from looking controversial topics up, a typical public school's firewall is likely even more restrictive than the Great Firewall of China.