Some people are very private. Some people are very happy to shar

e. It's in their genes. Weighing the pros and cons of Facebook,in this very efficient society. People have to find a way between being effient and being social (the old way of getting sugar from neighbors/relatives don't work anymore in most places unless you go to an island 3 sq miles big and drive with golf carts).  It's about using FB and being used by FB. Finding the right balance.