I always hear that people hate the use of FB others do and they are afraid of someone not knowing very good seeing their personal info. Well if you use your fb in a clever way it can be extremely helpfull! i.e. i mainly use to be in touch with close friends and participate in countless groups that are WW2 related. I've found many collectors from allover the world there and people in our field that have gained my respect with their knowledge! Also fb use the information i provide it in order to suggest me more WW2 related groups, pages and links. So i have unlimited access to information and pages in my field of interest.
If someone you don't know very well tries to search you will never be able to find you if you know how to use facebook's abilities!