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Hi Irving, thank you for your replies. I am new to SEO. Could you please elaborate a bit . what do you mean by sabotage here?

Thanks.

Here is the screenshot. This is part of the SEOmoz PRO link analysis.

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I think my competitor is using Black Hat SEO. They are a training institute but when I use the PRO tool to check their inbound links, many are links to porn sites.

Is this illegal? Can i do something about it?