An example of "Keychain" abuse is how Facebook so disgustingly tracks you even after you delete all apps, and can track you even after you restore an iCloud Bac

An example of "Keychain" abuse is how Facebook so disgustingly tracks you even after you delete all apps, and can track you even after you restore an iCloud Backup ON A NEW PHONE! • It shows my previous accounts even after I delete the app. • Clearing Safari's cache does not work. • Disabling iCloud Drive and iCloud Keychain does not work. • Even completely signing out of iCloud does not work! ---- WHY can't the user see this data? WHY can't the user delete this data without going through the app? WHAT ELSE do apps store on our devices that we aren't even aware of? (This is just what we can see: The list of saved accounts for "quick login") HOW MANY other apps are secretly doing this? WHY does Apple even allow this in the first place?? Worst of all, WHY aren't more people raising more of a ruckus about this extremely appalling practice?!