I just thought I would add that enough people fought Righthaven's predatory practice that they are essentially out of business with their worthless "copyrights" being auctioned off to pay attorney fees of those they wrongly sued. There is a whole website listing court actions, articles, etc.
http://www.righthavenlawsuits.com/index.html. The latest article they list shows almost no market for the sale of their worthless copyrights.
http://www.vegasinc.com/news/2012/ma...ven-copyright/