 Some even argue a conspiracy theory, with governments planting evidence of hoaxing to muddle the origins of the circles.When Ridley wrote negative articles in newspapers, he was accused of spreading "government disinformation" and of working for the UK military intelligence service MI5.Ridley responded by noting that many cereologists make good livings from selling books and providing high-priced personal tours through crop fields, and he claimed that they have vested interests in rejecting what is by far the most likely explanation for the circles.