I think the point is that if off their tits marsupials get the urge to make patterns think what something with opposable thumbs, a piece of string, and skin-full of Red Stripe* will get up to.
*or whatever it is the young people drink these days. In my day it was Newcastle Brown, Red Stripe, and Breaker. Anyone remember Breaker? ****ing awful stuff. Got you drunk though.
Newcastle Brown Ale's still going strong.
But I doubt the creators of some of the amazingly intricate artworks shown in this thread are on it.
These designs would have to be carefully plotted on computer first, to the point of planning elliptical circles on slopes that will look perfectly circular, or else look perfectly 3D from the air -- and I mean perfectly.
The teams, of probably at least twenty in some cases, would have to first survey the topography of the intended field and then be trained with repeated dry runs to the Nth precision to come in and work silently for just a few hours in darkness to lay the stalks in grids and patterns
without breaking them to create light and dark 3D effects, without any mistakes at all, and without bumbling around into each other.
It's not just crop circles anymore, its DNA strands, complicated 3D molecules, screen-print faces with shading on the facial planes, a CD disc painstakingly marked with the correct code that can be translated into words -- all sorts of things, and no beer cans or roach ends left lying around afterwards either ...