That one is in the category of things that is little more than a nuisance in practice since it’s so easy to circumvent, but that’s a hardware thing and therefore it’s easier to plug something in that is unauthorized. Things are getting so tightened up on the software side with secure boot, Apple’s read-only system partition and by-default App Store Only policy on the Mac, etc. that I suspect this type of thing will be a pain for normal people, though actual at-scale bad actors will probably figure it out.