I think it is interesting that the discussion has shifted away from member feedback and opinions about products on the forum and toward professional reviews and why they are usually positive, and that negative reviews are unethical and why.
David, Yes, this is true and we read about such cases here. Were those products represented by fellow members of WBF?
Kedar, I know how you feel. We are being told it is unethical, at least for professionals. The standard must surely be lower for audiophile forum members who simply try products in their systems and want to share their experiences, but I don't know anymore. It seems that even non professionals are also being asked to meet a pretty high standard before they say anything negative. I was told I don't know what I'm doing, that I am biased against the product, and that my not being impressed with the product had been expected. All behind the scenes. I shutter to think what might have been written publicly about me and my reasons for returning a product.