No doubt about it
The old fashion way
Computer+GPS can facillitate making crop circles...
No doubt about it
The old fashion way
Unless you are talking about computers and very advanced weapons systems . . .
the computer does
NOT
flatten a single stalk of grain—nor does the GPS.
And a couple of drunks with boards and a string cannot physically do a fraction of the complicated ones in an hour or less . . . as has been the verified case of many complex ones . . . some IIRC, in under 30 minutes.