Teh Aliens Have Our Pi

Oooo, noes! According to this news item, a crop circle found in England contains the first ten digits of pi, encoded as radial sectors.

...Ahem. In base 10. With an obvious decimal point. Look, let's say you are a nonhuman alien (yes, you, sir, the fellow in the back). Despite your having, say, eight digits (arranged on three arms: three, three and two) and using trinary notation, you have doped out our symbols well enough to know we're into base 10 and use either a period or a comma to indicate subdivided values of one; you are even hip enough to get which the Brits prefer. Knowing all that -- and it's less obvious than it sounds -- you then concoct a silly scheme to show you, just like the Babylonians, can approximate the ratio of a circle's circumference to its diameter and when you apply your glyph to the green'n'peasant* lands, you -- wait for it -- end with a stylised ellipsis to show you know it is an irrational number that just keeps on going, 'cos you know mathematical notation is, like, universal. (Go look).

Two possibilities:
A) Genius nonhuman juvenile delinquents doin' the galactic version of a mega-witty tagging job on farm fields in an odd corner of a small planet to bedazzle the benighted.
II. Crown subjects with too much time on their hands and no respect for private property.

Mr. Occam, the envelope if you pleeeeze....?
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* Yah, yah, I know where they were a-goin' t'build Jerusalem but lookit your hooligans, your laws and your towns laced with cameras and tell me "pleasant" without a trace of irony.