Kicking out the trolls - Antecedents of social exclusion intentions in Facebook groups

When contributing to groups on social networking sites (SNS), not all group members necessarily adhere to the group's norms (i.e., its explicit or implicit rules); in other words, they show norm-deviant behavior. Despite the popularity of groups on SNS and the frequency of norm-deviant behavior within them, research has to date rarely investigated how members of online groups react to those behaviors. This article introduces a model based on the social identity approach regarding the responses to norm-deviations in Facebook groups and reports an experiment testing this model. In this experiment, deviant members were perceived as questioning what the group stands for (i.e., as subverting the group's identity). Perceptions of identity subversion, in turn, motivated group members to derogate and exclude the deviate. Furthermore, participants were found to ignore the deviate's contributions (i.e., not to recall them after reading the group's timeline). Taken together, the results suggest that group members perceive a deviate's behavior as questioning their group's image. This, however, does not seem to lead to a group's decay, but rather promotes a “natural purification” within the group through elimination of negative influences.