I'm also inclined to believe that. Only one problem: in addition to crop circles that can easily be attributed to humans there are some that has been really hard to pin down it seems. (Because of the product of precision and timing etc.)

I think it could be interesting if someone would watch those places with drones and IR etc but until it is thoroughly explained I'd admit that we expect to be able to explain it but at the moment we don't know.

Edit:remove hyperbole (be more than happy -> think it could be interesting )