While I do believe it is important to show a degree of sensitivity to others feelings in our daily activities, their is a line. Some folks are sensitive about just about everything, and if we try to accommodate their feelings, we'd have to quarantine everyone in their homes. A balance needs to be struck between people still enjoying themselves and having a good time, and not encouraging extremely prejudicial and hateful behaviour. Dressing up like another culture and celebrating said culture is not hateful and should actually be encouraged. It actually is encouraged in most nations. I've lived in 5 countries and in each I was encouraged to dress in traditional clothing to their great delight (S. Korea, Japan, Scotland, Philippines were most notable). Dressing up like another culture to mock and degrade it is hateful and should be discouraged. See, it's not the clothes at all, it's the intent.