Suchmoon has clearly stated that he will give trust ratings based only on trade history.
Did I? I don't think I did. Actually I'm pretty certain that I didn't say anything particular as to what I would base my trust ratings on.
What I did say is that red trust should adhere to the wording on the trust page, i.e. show that "trading with this person is high-risk". Likewise positive trust should explain why the person is unlikely to scam.