All links of Comment Spam

MetaFilter - Referer Log Spam

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Referrer Log Spamming

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Sam Ruby: Referrer Spam

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Capn Design Archives: Referrer Spam is Out of Control

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AngryPets.com: ReverseDOS

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Redemption in a Blog: Smarter Referrer Spam?

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Added Bytes: Block Referrer Spam

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Comment Spam related site:

• Kalsey Consulting Group - Comment Spam Manifesto

• Internetnews.com - Six Apart Trains Guns on 'Comment Spam'

• OJR : Bloggers Declare War on Comment Spam, but Can They Win?

• Jeremy Zawodny's Blog - Guerilla Tactics Against Blog Comment Spammers

• Jeremy Zawodny's Blog: Using mod_rewrite against comment spam bots

• Comment Spam Wiper

• Wired - Googlemania: The (Evil) Genius of Comment Spammers

• Google - Keeping comment spam off your site and away from users