If you see a site violating the AdSense terms, you can now file an anonymous spam report that will get to the quality team for checking. To file a report, you simply go to the page that is showing AdSense ads and click on the "Ads by Google" (or "Ads by Goooooogle") link. In the form on the next page, include the term "spamreport" and put in a short reason about why you feel the site is violating the AdSense terms or policies. You can also enter your own email address, if you wish, then click submit.
