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FB also has shadow profiles of people whom they track even if they're not signed into the FB or even have a FB account. How do you suggest I opt out of that?

https://theconversation.com/shadow-profiles-facebook-knows-a...

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Good question. Probably you need to send a data request, so they can provide you with info they have about you. But based on what should they search in their data warehouse? IP? Cookies? Interests? Leaked email?

I guess one way to avoid shadow profiles would be to block FB scripts/cookies on pages you visit, so they won't track you.

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