Conspiracy theorist: That's what they want you to believe.
And in fairness, the whole nature of their secrecy means there's no way to know for sure. It might be just a boogeyman kept around as a useful tool for scaring people into not breaking national security-level laws. I mean, it's not as though I want to go around hacking the planet, but the idea of ending up at a CIA "black site", assuming such things even exist, would be enough to keep me from trying it.