Google is experimenting with a new feature that lets someone block unwanted sites from showing up in their search results.

Now "with one click you can drop that URL," Google software engineer Matt Cutts wrote in a recent account on his blog. The new feature was developed to sate Google users that wanted to "block unwanted sites," he adds.

The feature is available to anyone with a Google account and can be activated through Google's My Search History/Personalized Search. The offending site must first show up in search results.Only then will the feature stop it from showing up in the future. Google also allows users to block domains' worth of Web pages, Cutts wrote.

Before Google began testing the remove site feature, the only options users had were to ignore the dubious-looking listing, or report the Web address to Google via its spam report form. 

The feature is in line with the commonly held belief that most search engines' success depends on more easily letting users personalize search results. The new removable site effort, which is similar in intent to one from Google rival Yahoo, is in line with those core beliefs. But it's not without problems, according to some of those with knowledge of the feature.

"This may be a good way to get rid of spam in your search results, well, after you find it, which is a little too late," blogger wrote on the site Googleblogscoped.