Are our own reviews tainted ?

If I buy a component or a cable and I love it, I can't wait to post a comment on it because Im excited. But what about the products we buy that do not live up to our expectations ? Usually we do not like to talk about them. Now before I say this, I want to say I think everyone on Audiogon is great. All my dealings have been pleasant and enjoyable. Now if I want to sell a component or a cable I would never post , and Im sure 99 percent of you , would never post, a false hype of the product. But, and Im being Honest, I would not say XYZ cable sucks and then put it up for sale on the Gon. What do you guys think ? We knock the magazines {rightly so} for not knocking products. Arent we to a certain degree doing the same thing? Thanks. Michael.