I saw some old English villagers showing how they created such things once.
Doesn't necessarily explain all the crop circles but it does help explain why England has more than elsewhere. I kind of like them. Not sure about how the farmers feel but it's got to be better than cattle mutilation!
Anyhow, we have some lawn circles in my neighborhood. Everyone assumes it's some practical joker. We could have all been asleep when the aliens (mexican?) came down and put a crop (lawn) circle on Mr. Doddies lawn.
Not sure who's doing them but they don't have near the talent as the aliens in Britain. (come on USA! - Sorry Arizona)