this post was submitted on 16 Feb 2024
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Problem is that even those that have never setup an account with Facebook still have a profile that Facebook built on their behalf. If you are in any photos that friends/family/coworkers uploaded and if even one person named you in the photo, you are now known by fb and anyone who uses that data.
Don't even need that. Meta crosses multiple platforms now - Instagram, FB, WhatsApp, etc. All you need is for someone you know to have you in their contacts list, and the hit the "allow access" a single time. All of that data is then scraped, cataloged, and cross referenced with everyone else. Name, address, phone numbers, birthday, work address - anything your contact felt it convenient to add about you in their phone. From there it's just a matter of time until data mining of second and third level contact - or outright data leaks - fill in the rest of your profile and demographic information.