I really don't have much of an opinion on all these conspiracy theories. However, how many people, roughly, are "in" on these "jobs"?? It would just seem someone, somewhere, wouldn't be able to keep their mouth shut, i dunno, maybe i'm wrong.
Plus, I also wouldn't like living my life wondering if some CIA dude would knock on my door, ask if I go by Pike, then make me disappear. If they covered up 9/11, why wouldn't they cover YOU up. IMHO.