I was Googling up some info on Keyword Tools and noticed something that surprised me. Google offered me the option of blocking all future results from Google.com. I've seem this new feature pop up occasionally. I figured it came up when Google doesn't like a particular site.
It's funny. If Google excluded Google from SERP... For other blocked sites user can unblock them in future. But if to block Google itself and want to get back - how to do that?
this option is available in Chrome with specific plugin/addon. when we block a website, we are sending the -ve signal/vote via plugin for that site and this will effect its rank in serps...
This is another feature for personalizing the search results.... This feature is currently available in latest version of browsers... in no way Google can control to display this feature for specific websites. Just read this blog to know how this works, http://googleblog.blogspot.com/2011/03/hide-sites-to-find-more-of-what-you.html