I can sort of extrapolate the consequences of me having a FB:
1) ogm cn i b ur grrlfreind (when I am afraid of being in relationships).
2) I get bullied IRL for what people might think about me.
3) My sister will WTF at what I might do and say.
4) My account will be victimized in moderator action.
5) My potential employers will possibly not accept me if they find out #4 (if it happened).
>set page to only friends can see it
>block family on facebook
also, it's not like everybody has facebook in the entire world and that they can even find out you got deleted
(btw you can post research on facebook so it's pretty hard to get deleted)