On 脸谱 你 can block people and 你 can set your account to private so no one can see any of your information unless 你 add them. 你 can also make it so that only 你 can add people, so 随意 people don't go adding you.
潮流粉丝俱乐部 is 安全 but there is no real privacy settings, everything, even your club activity is public.
你 don't have to give your real name 或者 上传 your own 照片 on 脸谱 either. I do however because my 脸谱 is strictly family and 老友记 I know in real life only.