re: "Man made"...typical monkey talk
Fails to explain most noted physical anomalies
Ignores peer reviewed evidence
Ignores all witness testimony except that of admitted hoaxers, who rarely offer specific evidence of hoaxing
Ignores all video and photographic evidence showing the presence of plasma-like "balls of light" in association with crop formations
Assumes, without specific evidence, that 99% of phenomenon can be explained by 1% of known hoaxes
It has not been demonstrated that hoaxers are capable of creating the largest, most complicated glyphs known
Requires the existence of many as yet unidentified teams of hoaxers skilled in geometry and engineering, working worldwide and capable of escaping detection