Far fetched, yes, but not crazy. It's a trick the human brain plays on us: for something as monumental as a state of the air aircraft to disappear with nothing but a few bits of satellite data triangulated by using Doppler shifts is pretty incredible, we expect an equally incredible explanation. It's what makes the JFK and 9/11 conspiracies so believable to so many people, we expect a larger operation to be required for a larger tragedy.I know it's far fetched, but part of me wonders if the part was "planted" in the ocean to throw searchers off. Who knows where the rest of it is. I've always been skeptical about the whole thing.
The moon landing conspiracy theories I have no idea about though. We lit off thirteen Saturn V's, it sure as heck wasn't just for show.