Well, there are two ways a person can react when they find they've been given negative trust. They can discuss the issue rationally, or they can post their own negative trust. Either is fine with me. But if they make up stories about me, it makes me trust them even less. I've had users make up moderated threads so they could control the conversation, and they posted entire stories about me with little white lies here and there to discredit me. The truth just gets lost in all the BS. But when you scam, you don't care about the truth.
You were respectful, and you stuck to the facts, and that caused me to go and review the BTCJam listings and you were right - it's a common practice. As a result I apologized. It's very important to me that my trust feedback is 100% correct, so I don't mislead other users.