Fighting SPAM is everyone’s concern these days. E-mail providers try to create advanced Spam-filters that send offensive and disturbing emails out of your Inbox to a “Spam” folder (and, of course, sometimes valuable, long-expected messages from certain contacts end up there as well). Search engines are struggling hard creating sophisticated algorithms in order to present the most “relevant” results to the user – their success is somewhat moderate, I would say.
There is, however, another option. Grant USER the ability to “mark” certain domains as “unwanted” and “untrustworthy” aka spam. According to Google’s Matt Cutts, the search industry market leader spam fighting team “has definitely discussed this” and the option has a chance of appearing in Google search tools. Of course, Cutts was very clear about “not pre-announcing things before they lunch”, but the hint is there.
Based on the experience and data of the now-extinct SearchWiki, the feature of “user blacklisting” can be quite useful and successful. The intention is, reportedly, to provide the user with the ability to mark domains and create blacklists for any given keyword. This data, associated with user’s Google profile can be stored on Google servers, making it an effective tool for fighting spam or other unwanted content, which is regarded as irrelevant by a specific searcher.