Originally Posted by Sly

In theory a system like that sounds decent... but at the end of the day, I see someone getting bad ratings because someone simply doesn't like them. A rating system would need to be policed, which would essentially make it worthless.

I think the community is pretty decent at weeding out the scammers. You simply need to do your due diligence when doing business with a new party that you don't know anything about. This board is a great resource for doing that due diligence.