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by detaro
3567 days ago
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It measures the time a request to Facebook requires (which is exposed by the API, even if content, content size, ... are not). Facebook requests that a user is not allowed to see return quicker, so you can test if a particular post is visible or not to the visitor. combined with the ability to create targeted Facebook posts, that are limited by Gender, age and/or geographic location, you can find out details about the user you shouldn't be able to know. |
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