http://www.guardian.co.uk/world/2013/apr/02/americans-obama-anti-christ-conspiracy-theories My attitude when it comes to conspiracy theories is to just assume they're false. I'm pretty sure the vast majority are, and I wouldn't be able to identify and expose those that aren't.
Although there is one exception: Star Trek Five was the result of George Lucas bribing William Shatner and several people at Paramount in an attempt to destroy Star Trek. It is obviously true!