[XorNot]

There is an uphill effort here to actually do this. While theoretically a very informed adversary might get it right first time, human adversaries are unlikely to and their resources are large, but far from infinite.

Your entire effort is potentially brought down by someone making a change in a way you didn't expect and someone goes "huh, that's funny..."

[GauntletWizard]

Quite frankly, I'm surprised that is hasn't come up multiple times in the course of getting to NixOS and etc. The attacks are easy to hide and hard to attribute.