There is a difference, a big difference between dethatching and power raking. For clarity, I define power raking as using spring tines set at the highest level you can set them on a BlueBird or Husky power rake. No thatch is removed at all, just a thinning of the matted cool weather grass BEFORE it turns into thatch. This just thins out dead debris and improves surface air flow for new grass seedlings to grow and become established in the lawn. I did a 4k lawn today. The lawn looks great, but I pulled out about ten bags of dead grass in the process. No thatch was pulled up at all. It's like using a leaf rake... no more aggressive than that, but faster and more thorough, obviously. I agree that dethatching is not something that should be done but rarely, and only when the thatch layer has gooten too thick and impenatrable causing undue stress to the turf.... but a non-invasive power raking that does not put tines within a half inch of the thatch is a reasonable yearly maintenance operation that will promote healthy turf. My program consists of a light spring power raking and a fall aeration. Fall overseeding as well, when conditions justify it. There is nothing unethical about it at all. Calling it so, even with innuendo is pretty bogus. You want unethical? How about a lime application without a pH test.