So you're saying that the UFO's are almost wholly a particular element of a test study of our reactions ? While of course I can't ever know the reason for such a test, or why so long a test period would be required, I'd have to question why aliens would mimic the action of aircraft, meteors, or persons conducting a hoax, so often.

If such a study is likened to cats and laser pointers, the analogy is simple: the cat thinks he's chasing a bug- instinct tells him so, and he does it because he thinks/needs/wants/desires, or is required to pursue. Human beings are little different. We find out the likely reasons, do a cursory investigation, and then abandon the more extravagant, more difficult-to-prove theories to the nuttier elements of society to dream about. We pursue daily the likely causes of UFO's- planes without beacons, celestial events, etc., and that really satisfies most of the requirement, until there's more convincing evidence to examine.