My first ever attempt at questioning the established world view, were the NWO/Illuminati conspiracy theories. I watched alot of Alex Jones' documentaries and ofcourse the Zeitgeist movies (which I actually still like, for reasons I will explain later).
For some reason however, these theories failed to convince me. One of the problems as I perceived them at the time, was the tendency to get alot of facts mixed up with some rather dubious speculation. For example: I remember watching Endgame by Alex Jones and at one point, he claimed that the NWO-elites wanted to exterminate vast numbers of people (If I remember correctly, it was either 1/3 or 2/3 of the global population). Now this claim just seemed made up. I certainly couldn't discern this conclusion from any of the factual claims he made in the documentary (I think it was preceded by him pointing out that the US had taken in alot of Nazi doctors for eugenic research). These sort of things made me a bit wary of these conspiracy theories.
Institutional analysis
Second -and I didn't realize this until later- these conspiracy theories usually lack any kind of institutional analysis, which seems vital to me for offering a solution to the problem. After watching a documentary, you are left wondering: what now? Is everything going to be okay if only we could get rid of these evil people and replace them with the 'good guys'? It seemed to me that there has to be a better answer than this.
This is what seperates Chomsky from the average conspiracy nut. He looks at what people with power do and follows up by examing why they do what they do. What is their institutional role, how do these institutions function and what needs to change in order to achieve a better world? Now this is something that is actually useful. And Zeitgeist has at least -whatever you think of it- moved into a more analytical and solution-driven direction with their latest two releases. Which is why I still enjoy their work.
Dogma & trivial issues
Conspiracy theorists also seem to attract a dogmatic cult-like gathering around them. Anyone who questions their beliefs -like Chomsky with regards to the 9/11 conspiracy- is denounced as a puppet of the CIA or a so-called 'left gatekeeper'. According to some, WikiLeaks also serves as a propaganda outlet because they are not releasing documents that confirm their grand conspiracies.
On a finale note, conspiracy theorists also seem obsessed with the most trivial of things like the Bilderberg Group. I never understood why they get so worked up about this. Wake up people, this is the age of technology. These people don't operate in a vacuum 364 days a year. If there is an evil conspiracy, I highly doubt stopping them from getting together at this particular meeting will be much of a hindrance to them.