Matt Cutts the head honcho of Google’s Web Spam team recently released a video on how to report Black Hat SEO and web spammers that manipulate Organic Search results.
If you suspect that an SEO or website is egregiously engaging in Link Spam, Keyword Stuffing or other blackhat SEO techniques, you can report their malicious activities to Google’s Spam Reporting page. Right now you are limited to 300 words in your report so you may have to make your spam report concise.
Visit this link to report spam to Google. Note that you will need a Google Account to file a report.
Contact GlobalWebFX.com if you suspect that a competitor is using spamming techniques to get their website ranked unfairly in Google Search. We can research your competitor, find and report spam on your behalf to Google if they are violating Google’s Webmaster Guidelines.