Trust feedback is not moderated (except for completely obvious spam (advertising, tons of feedback with nonsense text, etc.)) for a reason. It would leave too much room for abuse from the moderator's side.
Edit:
well thats a good question but i warned in a topic that the op is a proven scammer and then he gave me a negative feedback
He probably doesn't belong to many Trust lists so most people won't see his feedback and even if they do, they'll probably ignore it.