I'm in no way denying the benefits that people may find in using these threads, I just think it's a small number within the marketplace. I also am not expecting Mods to begin identifying and fighting scams. I decided to look at it this way, Are they a net positive in the Marketplace?

Yes the feedback system has the potential to deal with warnings being placed, that only happens if someone in that users trust list gets there first and tags that thread as they see fit. This is all sideways from my main point though. I  just don't see the overall benefit to these being an option in the Marketplace.

Is there really any reason that the Marketplace can't evolve to provide a better (imo)  overall user experience without imposing rules. It could be seen with the same argument as not being able to edit posts in Auctions.