An anti-cheat relying on a kernel module would have to provide the source code of that module (the glue part, at least). One could then modify and compile that

An anti-cheat relying on a kernel module would have to provide the source code of that module (the glue part, at least). One could then modify and compile that module as he want. Also, you could easily write a sandbox environment at the kernel level dedicated to a specific anti-cheat.