I am curious. Is there anyone on this site that believes in any conspiracy theory at all? Kennedy assassination? 9/11. Sandy Hook, Titanic? Anything?
I don't claim to speak for everyone, but as this board has evolved over the years it has collected mostly people who don't "believe," period. They agree, provisionally, to those things for which there is a preponderance of evidence.
This is orthogonal to the entire concept of conspiracy theories. If they are well-tested, they are history. Or science.
It is one thing to wonder about the possibility of intelligent life out there (insert obligatory joke). It is entirely another to argue that it must or must not be; at that point you are proposing a hypothesis, and that opens it up to rigorous testing. So come here with the idea of an intangible soul and, sure, some forum members will entertain it alehouse style. Come with a claim that the Earth is flat and that's a testable idea, and people here are, well.....eager to test.