One frustration I have, is that negative feedback sometimes does not say much. I've seen some that just said something very basic...it was just a "no show", "strange guy" or "backed out of deal". The more details you can provide to others the better off we all are. For example...if it was a no show, add how much time you waited for him and if he did or didn't call you. Additional info helps us understand what occurred during the deal to justify the negative. Plus we'll know whether we'd even consider trying to deal with him.