It is slightly different to ebay because ebay feedback is both ways.
Perhaps it shld only be positive comments to save world war 3 which has occurred in the past when members have purchased machines from each other and left something other than a positive comment on a post.
Perhaps the mods could conduct a vote with that consensus style post you guys use well from time to time and gauge the forum members majority decisions ?
The trade count hasnt got off the ground yet and seems to be a hot potato already. I think the positive feedback is helpful to the forum, perhaps the neg one will only hurt. Its up to the Mods to best decide.