EM seems to be much more mature then the other two and I would say that he is contributing positively to the community. He seems to not like people selling what is clearly stolen gift cards (who would like these people -- except other people involved in fraud), but instead of unanimously starting to leave negative trust for a bunch of sellers, he solicited feedback, input and advice from the community on when to leave negative trust for gift card sellers. This is evidence that he is not adopting policies on negative ratings based on his own personal feelings but rather based on the community norms.

I believe that the other two have good intentions but maybe they got power hungry (this was suggested above), and they seem to develop their policies of negative ratings as they go. I fear that they may get to the point that if they wanted to, they could adopt policies that would apply specifically to their enemies and/or critics. Imo the best basis for a negative rating is when someone actually stole money from someone and/or clearly attempted to steal money from someone. I believe they are greatly expanding above this threshold and this is dangerous.