Influence on Social Behavior: What is an example of mask and why are they misdirecting or misleading?

For example, while a handle or username "student2006" may mean that the user is a student, "2006" may mean either the user's year of birth or year of entering school. It is possible also that the username is randomly created and it is not the user's real identity. Choosing a gender also gives the user the option to either be a boy or a girl. Setting the birthdate online gives the person the option to either be younger or