4. The strangers.
Normally an adult is expected to have a total of 338 friends over their Facebook. Now in all honesty how many of them are really their friends, the one they want to keep a contact with regularly? They probably have new interests now, have changed, or have new friends now. You might want to spend that time on people you really love and have to keep contact with. We are not taking sides but perhaps Twitter would have been a better option.