I've never had a FB account, but some years ago I got an email from FB listing a number of my friends and family and saying, "All these people have FB accounts. Wouldn't you like to join FB?"
The email included a reply option labeled "don't contact me again," which I chose and then replied. But a few months later I got the same invitation.
Needless to say, I found that to be deeply disturbing, and it confirmed my determination to never subscribe to FB. Later I learned about the phantom accounts. I'm sure FB maintains a dossier on me to this day.
[1] https://about.fb.com/wp-content/uploads/sites/4/2018/06/fina...
And surely they'd never mislead anybody regarding what data they keep.
Which admittedly makes it a bit hard to explain how, despite having completely deleted my account several years ago (yes, not just deactivated, I went through all the little guilt-trip pleas not to delete), they managed to accidentally (a bug, presumably) send me a Friend Suggestion email several weeks ago (suggesting someone I actually do know, no less) considering that by their own words they should have wiped both that email address and the social graph associated with it several years earlier...