My favorite self made up conspiracy of the moon is:
As we all know the moon is moving away from the earth slowly each year but that means it was once much closer perhaps so close even that it rolled along the surface of early earth, pushing down on creatures that were lazy and didn't get out of the way into the ground giving us fossils.
When the dinosaurs disappeared it wasn't from an apocalypse they just got tired of being squished and dino capitalism and decided to grab onto the other side of the moon as it rolled by and are now stuck up there.
And that's why the government won't let us go to the moon. Because they don't want us to meet our dino comrades.