New Chrome extension: block sites from Google’s web search results
1. http://bit.ly/gTADhE2. Click Install, close page3. Open each of the links below in a new tab, click block on the first result4. Win.http://www.google.com/search?q=Mahalohttp://www.google.com/search?q=ehowhttp://www.google.com/search?q=experts-exchangehttp://www.google.com/search?q=livestrong.comhttp://www.google.com/search?q=answerbaghttp://www.google.com/search?q=bills.comhttp://www.google.com/search?q=chacha.comhttp://www.google.com/search?q=associated+contenthttp://www.google.com/search?q=efreedomhttp://www.google.com/search?q=questionhubhttp://www.google.com/search?q=squidoo.comhttp://www.google.com/search?q=about.comhttp://www.google.com/search?q=yellowpages.com----Edits: fixed formatting, added suggestionsThis method is fine. The actual data sent to Google when you block a domain does not contain the search query (or the referrer).This is what gets sent when you block a domain:  http://www.google.com/gen_204?atyp=i&oi=site_blocker&ct=addToBlocklist&ei=[CSRF-cookie]&cad=mattcutts.com

and unblock:  http://www.google.com/gen_204?atyp=i&oi=site_blocker&ct=deleteFromBlocklist&ei=undefined&cad=mattcutts.com

(Interestingly the CSRF token is broken when unblocking.)