I would say that it most appeals to students, as they are the ones trying to find their identity, and ones who like the express themselves however they feel. They are typically the ones who dislike dress codes.
The sentence "a school dress code policy would inhibit students 'free expression and sense of identity," would most likely appeal to students. In fact, it may be a warning for all the students, especially adolescent who may desire to express themselves and show the identity they are building. However, many schools have certain dress codes that prevent students from dressing as they want or as they do in everyday life.
