Thankful I have not succumbed to signing up for FB for a multitude of reasons.
My wife shares with me a few nuggets from time to time, and I'm sure the FB shadow profile on me is highly suspect. Too bad the only solution it would seem would be to sign up and never use the service using a virgin email account and provider.
I never had that concern with G+ - I mean, you already knew that they had your information, simply by owning and operating an Android device/being in their ecosystem for a decade.
Water under the bridge and all of that...