I once knew a brother-sister team that played FFXI together. The brother played a female and the sister played a male, and they would be totally in character. She called her brother 'sister' and would get mad at people who called her 'she'. They had a third sibling that was a guy playing a female character but was up front about it. Then he 'outed' the other two and they got really mad at him and stopped partying with him. Weird family...