File sharing programs and filters

The Government Accountability Office released a report studying peer-to-peer networks and pornography: what P2P clients are available; how easy it is to retrieve (deliberately or accidentally) pornographic files; whether filtering measures are available; and how effective filters are. The study also compared filters on Google, Yahoo, and MSN, and found that MSN's was the most effective in blocking porn, while Yahoo's was largely ineffective. The full report is available in PDF.