Is this more about putting a 2001: A Space Odyssey reference on the moon for fun or leaving a record of our civilization in case it destroys itself? I'm in favor of the second, but the first doesn't seem much different from carving the Coca Cola logo.
Now imagine humans do find some artifact somewhere, they develop subtle theories and even religions based on it but in fact that was just an object set there as a prank, funded by alien fans of some alien movie 2001 equivalent.
