Good article.
What I find interesting is the way the system is being used.
Personally, I am using it to indicate who I trust and don't trust. That is done by placing feedback on their page. I make an effort to link to what is driving my opinion. This helps me determine if I will be interested in doing trades with them in the future.
One result is individuals who I have indicated I do not trust have chosen to give me a negative mark in return. Rather than address my concern about why I don't consider them trustworthy, instead they have chosen to "counter attack" me. To me, this is a basic fault in the existing trust system. Once distrust has been established, there is no process that rebuilds trust. Those who I have marked as not being trustworthy have no recourse but to return that mark.
It will be interesting to see how this plays out. I will continue to use the system to indicate who I do and do not trust. My decisions will NOT be based on only trades. They will be based on all behavioral clues, posts, public information and financial transactions. Off color jokes, professed membership in racially intolerant organizations, and ridiculous Pollyannish views about anarchy and government will all be included in the assessment that I make, for my personal use.
If you wish to see my assessments, feel free to add me to your trust list with the "Depth" marker set at 1. I offer no guarantees regarding my assessments but they are there for you to see.