oldfan - There has been some debate on the actual usefulness of a "bad traders" list on the stats page. Generally after a person reaches -1 (on their first deal) they are no longer seen or heard from.
Ted S - You can modify the templates & PHP file quite easily to restrict based on whatever criteria you want. For instance, my FS/WTB forum is only visible by a certain user group, which that user group is auto-promoted when a person reaches 100 posts. So basically I modified my templates and files to only show ratings for people in that group, and only that group is allowed to rate people. I believe I included some basic instructions in one of the text files.
Anyhow, I'm going to be out of town tomorrow. Hopefully I can button things up and get it packaged together on Wednesday. There's not as many features as I would have liked to incorporate, but it's better than nothing right now...