Those who scored high on a test for grandiose exhibitionism tended to use social media for self-promoting activities, such as frequently updating statuses. Those who showed high levels of entitlement/exploitativeness were likely to exhibit anti-social engagement behaviors, such as reacting angrily to challenging comments and posting in ways that sought support without supporting their friends in turn. Narcissism and self-esteem differ, as the former damages relationships with its correlation to antisocial behaviors and manipulation. Self-esteem has been correlated with prosocial behaviors and benevolence.
(University of Western Illinois study)