The credulity of folks like you leaves me more dismayed than spee(e)chless. It doesn't take an alien spaceship to do that, OK?
Why don't you try it yourself genius? I'd bet you couldn't due it with a team of helpers with unlimited time, let alone 4 hours. And I mean make it PERFECT, as in the original crop circle.
The self-righteous indignation of folks like YOU who can't ascertain the wheat from the chaff makes ME want to spew. Just because something goes against your preconcieved notion of what is possible and what isn't, you think people with more insight are fools. You'd probably have believed the Earth was flat if you were born several centuries ago, and you more than likely would have ridiculed those who thought otherwise.