Okidok; You say;
"Why? because it is impossible to create this image in 15 minutes with only help from your feet."
What PROOF do you have it was created in the time period you specify. Someone SAYING that is N O T PROOF.
Remember, we believed what people told us and it was a L I E.
Have you looked on the web at the alternative explainations of crop circles? Or the fact that many crop circle sited as 'alien made' by crop circle 'experts' were actually made by hoaxers?
The Dulce report; do you believe that SHIT? It's page after page of delusional drivel. It makes the scripts of most 'B' Sci-Fi movies look plausable!
AND are the aliens so STUPID that they cannot communicate directly using technology that might be archaic to them, but would be easily duplicable to a star-faring technology?
Or do they piss around in fields?
It's like the idea that 'god' makes all these obscure prophecies and doesn't prove his existance even though he could, because he wants people to have 'faith'. It's a poor excuse to cover up for something that doesn't exist.
Why go from believing in god to believing in aliens? There is no proof of either! Do you just NEED something to believe in? Is it SO terrible we are a bunch of clever primates who are born, live and die? Stop dreaming, start living. The answer to life's problems doesn't come from the skies, it comes from INSIDE YOU.
Note; I am not saying there are NO intelligent alien races out there, but there is no proof they have attempted to communicate with us; the only message recieved from 'Outer Space' was a short inexplicable burst picked up in the seventies I think, and not repeated since, and even SETI scientists don't count that as proof!
Sorry if I am a little harsh, but you would probably treat an adult believer in Santa Claus the same way for the same reasons. Do some research into the cyclical nature of seeing alien phenomena and how the tendancy for people to see portentious religious scenes in the sky disappeared to be replaced by UFO's.
It's mass delusion and wishful thinking. Prove otherwise.