[throwawaylolx]

> I don't think they will tell you the whole truth.

This is true:

>We receive more details and activity than what appears in your off-Facebook activity. For technical and accuracy reasons, we don’t show all the activity we’ve received. This includes things like information we’ve received when you’re not logged into Facebook, or when we can’t confirm that you’ve previously used Facebook on that device. We also don’t show details like the item you’ve added to your shopping cart.

https://www.facebook.com/help/2207256696182627

[jannes]

Thanks for that link. Looks like the infamous "ghost profiles" are officially confirmed now.

I wish they would show the ghost profiles as well, but since it's not linked with 100% confidence they are probably not allowing it because it could be a privacy violation if it turns out that the link was incorrect (i.e. they showed a ghost profile to the wrong user).

[gvjddbnvdrbv]

I'm not sure how ghost profiles are legal within the EU.

[hosteur]

They can’t be I think. No way to opt in. Or even to inform the person.