|Google is working on a new experience within their search result, offering a way to the users to customize their search (voting for or against a result). Unfortunately this behavior would be only for the users not for all the research neither than for a network of friends / coworkers:
It sounds quite obvious why Google doesn’t want to open the result to a voting systems (security, spams, relevancy,…). I’m quite persuaded that Google thinks the best way to deliver pertinent search results is to analyze the content of a page and it network of link. Meta tags proved us that we can’t trust people on the web, but meta tags were created by the webmaster (or any things / persons involved in the creation of web pages) and here I’m talking about social results. A platform like Digg proved that a lot of users can give a liability to a voting system, so why won’t Google trust the mass?
Get more information here and here.