>> What do you mean? I'm not talking about that at all. I'm talking about how when you go to the grocery store and someone snaps a selfie with you in the background, FB knows. They know when you take the subway and where you go.

"I don't care if FB knows I was at the grocery store, or at the mall, or on the subway. I care about not missing the invite to my niece's birthday party."

>> They [will] know pretty much every single detail of your life even if you don't have an account.

Imo, this is fearmongering...