Given the fact that 90% of the world’d crop circles happen in England, what do crop insurance companiesin the UK do? Do they pay out on such claims?
Are cropcircles considered an “act of God”? Or, are these things so common that the insurance companies refuse coverage?
Of course, if they are caused by “alien intelligences”, maybe the government should take a hand? 
If the two guys responsible for most UK crop circles carved them with the farmer’s permission, the insurance companies wouldn’t pay up.
However, if they were carved without the farmer’s permission, then it would be vandalism, and, therefore, would result in the insurance cmpanies paying up.
Whether they circles are made by those two guys, or by aliens, either way it is vandalism. If the farmer’s policy covers vandalism, they get paid.