It's not like video card companies don't have black boxes in the kernel. Maybe nVidia will make an anti-cheat API and then it's gonna be a choice between "have a 3d accelerator at all" and "clean kernel."
Which is why people who care about stuff like this use an AMD GPU, whose driver is open sourced and mainlined in the kernel.
This is not perfect since there are still BLOBs, but it does help a lot.
