Google made some changes in January. http://idaconcpts.com/2011/03/05/google-targets-scraped-content-and-content-farms/?utm_source=rss&utm_medium=rss&utm_campaign=google-targets-scraped-content-and-content-farms http://googleblog.blogspot.com/2011/02/finding-more-high-quality-sites-in.html https://chrome.google.com/extensions/detail/nolijncfnkgaikbjbdaogikpmpbdcdef Note: It can access your data on www.google.com and on encrypted.google.comand it can access your browsing history. Therefore, IMO, users give up considerable privacy when they download and use the Personal blocker App. However, it would be nice to have a one-click system to crush Link Farms (content farms) and scraped content sites!