The most terrifying conspiracy theory of all, is that there is no conspiracy at all.
A world governed by pure chance (and maybe some greed & stupidity)
"We're living on the Planet of the Apes. Is that funny or serious?"
- Robert Anton Wilson
Facebook accidentally shipped "tens of thousands" of VR controllers with hidden messages like "Big Brother is Watching" and "The Masons Were Here":
https://www.businessinsider.de/facebook-weird-messages-oculus-touch-controllers-2019-4