The decision begs the question: should college admissions officers take into account a person's sexual orientation? Some would argue yes, either because gay students may have faced adversity or because a diverse student population makes for a better learning environment. But if students want to highlight the diversity they might bring to a class or how overcoming adversity strengthens their applications, why not let them do that in the personal essay? And you also could argue that sexual orientation in and of itself doesn't really tell you enough about the applicant. Do you think the question is a good idea?