However this situation can be made orders of magnitude more serious with only a little cultural tweaking when writing science fiction. E.M. Foster explored this in her 1909 dystopian story "The Machine Stops". In which she not only describes the internet but postulates with great accuracy how it will affect human interaction. In this world she creates to be outcast is death. Or so her characters think. It is a terrifying picture and yet it still only shows what happens to outcast humans. What would happen to an outcast who relied on some sort of hive mind?
What sort of alien physiology/culture do you think might make being outcast the most dramatic?