Thus Joe Silverman, CEO of New York Computer Help, an IT outsourced service company, found himself several years ago embroiled with a black hat SEO firm that, unbeknownst to him, exchanged links with non-related websites.

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Other than trying to scare you into buying every single product the company has ever released, the paper highlights the growing problem of Black Hat SEO, or SEO Poisoning, which (if done right) sends malware-ridden links closer to the top of your Google search results.

ENGADGET: Report warns of the increased use of SEO Poisoning to spread malware

Penney, the company was unaware that its SEO service provider was using black hat tactics, and it has now fired the provider.

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