Personally, I think that the scientist in the OP is clutching at straws [pun intended]. Crop circles appeared in history long before man had the scientific knowledge to make the internal combustion engine, much less microwave emitters and the like.
And wallabies stoned on opiates? Yeah right! With the amount of 'day trippers' we have in this country, there'd be NO opiates left for wallabies or any other wildlife to get high. Nope, Aussie crop circles were made by aliens... just ask any one of the 'day trippers', they'd know, out there congregated in the bush together as high as kites. Yup, they'd have a bird's eye view of things from up there.... and that's why the cops are always seeking out and destroying dope plantations [except for the bit they keep for themselves]... it has nothing to do with the illegality of pot, they just don't want the stoners to see what's really going on out there.
You see, the Aussie government is in league with these crop circle making aliens, and in exchange for some alien technology, Julia Gillard is implementing a carbon tax to raise enough money for the fuel to get them home to their own planet. Space travel ain't cheap, you know, and we, the Aussie public are paying for it. while experts offer up smoke screens such as climate change, global warming and stoner wallabies.
As for the scientist who wrote the paper on crop circles, well the government gave him some of the best opiates confiscated from out bush, and he was like putty in their hands... wrote exactly what they told him to to throw us off the scent... of the UFO's and their secret stash.
*Pssstt, if I fail to show up here again you'll know what happened... I'll have bee silenced by the government*