[albeertoni]

Schneier linked to a study that might explain why some people don't seem concerned about their information being collected for secret government programs.

http://www.schneier.com/blog/archives/2013/07/secret_informa...

Of course, there's also the "I've done nothing wrong, I have nothing to hide,"-type folks, and people who are generally authoritarian too.

[pygy_]

Classified texts may be seen as more accurate and reliable because they are assumed to be free of any attempt to manipulate the public.

I didn't read the paywalled paper, they may already cover this hypothesis.