known backstabbers

[Septimius Severus]

Following on Calahan's idea somewhat, I'd still say Militarist, that something like a pledge (along the lines of Baalz's Good Player Pledge) could make your goal for this thread become something of a reality without creating bad feelings and labeling people. A Good Ally Pledge thread, or what have you, would be both positive and constructive for the community. Reaffirming the view that many of us hold in keeping our word in games with binding diplomacy and towards one another. It would not be a list, pledging would be voluntary, but it would at least provide new players with some some assistance (which I think was part of your goal) in knowing something about potential partners in a game.