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