For all the shit you know, there's more out there that even's worse, and there's another load of shit that's classified that you'll never know.
When I was attached to a Naval special operations unit as their quartermaster and small boat coxswain, I had a top secret clearance and I had access to Intellipedia. I made the mistake of just sitting down after watch and reading. And reading. And reading more. I quickly came to the realization that its a good thing I don't have Superman's powers. The amount of people that not only deserve to be dead, but need to be dead is enormous.