The phrase "conspiracy theory" was coined by the CIA. [1,2] It is one of the greatest counters to the exposure of secrets ever invented. This article is a good example of why it is so effective. Who's going to question the authority and veracity of the BBC?

[1] https://projectunspeakable.com/conspiracy-theory-invention-o...

[2] http://www.zerohedge.com/news/2015-02-23/1967-he-cia-created...