Uh, you'd have to compile a Kernel that doesn't allow it while claiming it does ... And behaves as if it does - otherwise you'd just fail the check, no?
I feel like this is way overstated, it's not that easy to do, and could conceptually be done on windows too via hardware simulation/virtual machines. Both would require significant investments in development to pull of
All it takes is going to cd usr src linux and running make menuconfig. Turning off a few build flags. Hitting save. And then running make to recompile. But that's like saying "well if I remove a fat32 support I can't use fat32". Yea it will lock you out showing you have it disabled. No big deal.
Right, the very thing that works against AC on Linux also works for it. There are multiple layers (don't forget Wine/Proton) to inject a cheat, but those same layers could also be exploited to detect cheats (especially adding fingerprints over time and issuing massive ban-waves).
And then you have BasicallyHomeless on YouTube who is stimulating nerves and using actuators to "cheat." With the likes of the RP2040, even something like an aim-correcting mouse becomes completely cheap and trivial. There is a sweet-spot for AC and I feel like kernel-level might be a bit too far.