One of my guilty pleasures is reading conspiracy literature. It is sort of like reading science fiction and I think I enjoy it as a sort of thought experiment for how society might be. But what we call conspiracy literature has a long and possibly legitimate history as the continuation of hermetic or wisdom literature. Namely the idea that there is a hidden truth or knowledge that only some people can access. In fact, much conspiracy literature eventually returns back to secret organizations (ie wisdom traditions) 'really' running human affairs.
I would write more - but I want to finish reading about how the civil war was a conspiracy by european bankers to create more countries in america leading to a greater market for lending debt. (I guess they never heard of its ok we have municipal bonds - we can still trade credit default swaps on California)
As a final note the argument against conspiracies can also be a similar argument against 'intelligent design' namely it is more awesome and incredible that these events have taken place without central planning - to assume otherwise diminishes the wonder and power of these events.