Pluralistic ignorance
In social psychology, pluralistic ignorance is a situation in which a majority of group members privately reject a norm, but go along with it because they incorrectly assume that most others accept it. This is also described as "no one believes, but everyone thinks that everyone believes". In short, pluralistic ignorance is a bias about a social group, held by the members of that social group.
Multiple-use name
A multiple-use name or anonymity pseudonym is a name used by many different people to protect anonymity. It is a strategy that has been adopted by many unconnected radical and cultural groups, where the construct of personal identity has been criticised.