I think the big elephant in the room is more to be found further upstream, in the area of manufacturing. Worrying about software hacks is one thing - not having the faintest absolute clue exactly *what* is inside the chip package is something else entirely. Think its an accumulator bank? Oh sorry, maybe we forgot to mention the harmonic bundles associated with wave guidance within the interstitial distances of the rapidly blinking transistors .. yeah, those can be read from space. With a satellite (or 12).
The game is over folks, or rather .. the game is on, depending on how you look at it. Until you are capable of investigating and participating, directly, in the sub-assemblies, you will always have a weak back door. Either we, ultimately, become able to assemble our own chips on the desktop, or there will always be a power class: those who can build such devices, and those who can only be ruled by them.