Adopting physical or cultural characteristics of those with higher status/more power is fine. Adopting the same characteristics of those lower in status or power is risky. For example, virtually nobody would be offended if someone dressed up in full preppy regalia, complete with lacrosse stick, Dartmouth ring, and golden retriever. Many people would be upset if someone dressed up with a huge hooked nose, greasy cheek curls, and fur hat. Both costumes would be based on ridiculous stereotypes, but one would be funny and the other offensive