Sleep?

Atrios wonders:

I really wonder how the residents of Wingnuttia and their media mouthpieces sleep at night. I hate when I make a mistake. I hate when I get things wrong - it makes me feel like a fool and I feel responsible for making others who might not see the correction look like fools too if they pass it on. But, for some reason these people never get tired of being wrong. They must really get off on it.

I have the same impression. I'd like to do some more research into this.