Re: I'm (not) sorry
I've never had a Facebook account. But people have given Facebook my e-mail address so that FB can send me an invitation to "be their friend". I've long assumed that FB therefore knows a long list of people who wanted me to "be their friend" and has done their best to profile me based on my supposed associates.
Lacking a FB account, though, I have no way to control what FB knows about me, or even to _know_ what FB knows about me. In some ways, having an account would actually give me more control over the situation than I currently have. Which, I need hardly add, is bonkers.