Over 400,000 websites use the Facebook Comments plugin. Over the years, many people posted comments across the web that are now being harvested by data miners.

Facebook has an option that makes you believe you are deleting your comments on those sites, in fact, you are not deleting them and the comments remain.

The video demonstrates the problem and shows you how to really delete it by locating the actual site and manually deleting it there.

The flaw was discovered by Tris, a company that developers advanced private browser and chat systems.
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