to network with peopleEven if you have a facebook account you are not going to make a friend request to every random dude online, and even if you do and they accept you it does not mean that you will ever talk with them.
you're talking to me and other people on this board, you're not going full /innawoods/ or anythingBecause we share a common interest. This is not the case in say facebook if you do not like football or pop culture.