Turn it off in the bios.
Alarming is a relative term really, one could surmise that from whatever the total motherboard sales vs complaints, there isn't really that big of a problem ? Rather than what your suggesting or at least that what I see from the complaints made.
I dont install Armoury Crate on my PC's and allow it on my laptops becuase I cant be bothered keeping them up to date.
Yep, can be turned off in BIOS. Dont use it myself. Only thing I have installed is the last version of the lighting service so I can use Ique to control the lights on my MOBO. Nothing is connnected to the MOBO headers. Aura and now crate has never worked correctly since its inception. Look at posts in the forums. Far to many about issues with Armory Crate.