I guess you should read this very thread at first (since you wouldn't ask if you did). Just in case, I have already answered that question, directly (somewhere in the first pages of it). Further, beliefs in conspiracy theories as well as aliens are of the same nature as any other beliefs, so, I suspect, it has everything to do with religion (or lack thereof)...

But this is irrelevant since it is not for you to decide what is OT and what's not (yes, I checked, you're not the OP)