Parody, satire, humor, and puns are fully part of the marketplace of ideas, and it is unacceptable for a university like Tufts to violate its promises and abuse its "bias incident" policy to decide which jokes may or may not be told on campus.
Of the over one hundred etiquette subjects I have taught, dress and etiquette are always in the top ten. Dressing is not like setting the table, where rules rule. Are there rules for dress? You bet, but there's a lot more freedom of style.