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> or evil (unmask a protester agitating for societal change against a powerful state)

Can you give an example of how this technique could be exploited in such a way?

Find a site the target visits frequently that lets you inject something that will make a request to your server (“poisoning the well”). Use the gathered IP address, User-Agent and Language headers to start building a persona to look for.

And how does images in CSS help with that?

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