On Facebook u can block people and u can set your account to private so no one can see any of your information unless u add them. u can also make it so that only u can add people, so random people don't go adding you.
Fanpop is veilig but there is no real privacy settings, everything, even your club activity is public.
u don't have to give your real name of uploaden your own foto's on Facebook either. I do however because my Facebook is strictly family and vrienden I know in real life only.