Facebook will reveal who uploaded your contact info for ad targeting

Re:Facebook will reveal who uploaded your contact info for a... by reitanqild on Thursday February 07, 2019 @02:07AM (#19103577)

I see two options here: Data leaks and/or lying about where the data came from.

This seems like a really good starting point for an investigation against Facebook!

Anyone else wants to steelman Facebook before I and other become too excited? Because right now I don't see any other options.

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Re:Facebook will reveal who uploaded your contact info for a... by bigiain on Thursday February 07, 2019 @06:05PM (#19109593)

Maybe it's OAuth revealing that facebook only email address, if "login using facebook" is ever used in a 3rd party site? (I somewhat doubt anyone who goes to the lengths of using a FB-specific email address would fall for the privacy scam of using login with facebook through...)

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Re:Facebook will reveal who uploaded your contact info for a... by mrgreenfur on Thursday February 07, 2019 @04:01PM (#19108564)

I would guess that there are 3rd party companies who's business is to match cookie values behind the scenes to email / phone / address / demo data and re-sell it, or sell access to the aggregate db.

Hopefully a federal privacy law will clarify if this is legal at all.

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Re:Facebook will reveal who uploaded your contact info for a... by potatoyogurt on Sunday February 10, 2019 @12:12PM (#19128668)

That is basically LiveRamp's business model. There are other companies who do this as well. See https://en.wikipedia.org/wiki/Data_onboarding

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Re:Facebook will reveal who uploaded your contact info for a... by deytempo on Thursday February 07, 2019 @07:40AM (#19104827)

Sounds like a class action lawsuit might be in order

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Re:Facebook will reveal who uploaded your contact info for a... by kretor on Thursday February 07, 2019 @05:39AM (#19104309)

There's a third possibility: The advertiser guessed the email address.

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Re:Facebook will reveal who uploaded your contact info for a... by bgeeek on Thursday February 07, 2019 @06:52AM (#19104636)

Create unique email addresses with a password generator and don't distribute them. I don't buy into they just guessed them, tbh.

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Re:Facebook will reveal who uploaded your contact info for a... by reaperducer on Thursday February 07, 2019 @12:57PM (#19106926)

There's a third possibility: The advertiser guessed the email address.

Well, in this case probably not. Though I wrote "[email protected]" above, it's really more like "[email protected]." So the chances of it being guessed are infinitely small.

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Re:Facebook will reveal who uploaded your contact info for a... by underwater on Thursday February 07, 2019 @03:04AM (#19103781)

Why would Facebook lie about the data source? They released this information voluntarily.

It's possible that Facebook has been hacked or the above posters used Facebook connect to login to a third-party service that leaked the email addresses.

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Re:Facebook will reveal who uploaded your contact info for a... by gondo on Thursday February 07, 2019 @03:50AM (#19103930)

i wouldn't call that voluntarily. they have been pressured to be more transparent for quite some time. if it was up to facebook, they would hide these kind of information even more.

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