The other argument against them I have heard is, "They kill birds..." Well, if a bird is that stupid, it needs to be killed. Cars and trucks on our highways kill thousands of birds every day, yet no tree hugger is trying to stop cars from going down the road! The real issue is "free energy" vs. paying some oil or coal burning utility for it. You see, there is no money in free anything. (by that I mean no money going to politicians through lobbiests)