There have been comments made in other threads more or less stating "if you don't have anything good to say, then don't say anything." Obviously no one likes to hear negative comments about their work, but if those comments are made in a constructive fashion, without being rude or malicious, then so be it. This, and other public forums, is not the place to come if you are a thin-skinned type who can't take criticism about your work.
I personally think that Ken does fantastic work and is extremely talented as a modeler with scratchbuilding skills that I only wish I had. I can agree with his point that was made about listing things wanted or needed to trade for, and having responses from people who want what you have, but don't have what you want and I also find that to be very annoying. However I guess that will not change.