I'm shocked. My mind boggles.
An Oxford University professor of Evolutionary Anthropology Robin Dunbar conducted a study which showed that the human brain can only keep up with about 150 meaningful relationships. So no matter how many Facebook friends you may have, you can only manage 150 meaningful relationships. Dunbar has done other studies in the past to determine what the threshold may be for brains to manage x number of relationships, effectively. He then took his studies to the social networks to see if the human brain has expanded in it's ability to manage more relationships. His initial research concluded that the brain still has the same threshold, off social networks or online.
Aren't you just as shocked as me to know that your 500 plus fans on Facebook are not really your friends?
One last question, who funds these studies anyway?