Conspiracy proliferation.

Conspiracies are largely survive or die out due to publicity. Television program makers survive on these conspiracies and so prune off those that seem unprofitable, difficult to film.... Conspiracies are survive on non factual reasons. The world will never discover the truth: if there is a conspiracy: because it is a business based upon profit.

The government won't ever disclose their "alien files" because they like the cover it brings their secret programs too much.

A lot of the conspiracies being fostered on here are by disinformation agents being trained. This is the perfect place to do it.