your costume is not ok
S*T*A*R*S, an anti-racism group at Ohio University, created a campaign called "We're a Culture, Not a Costume" to get people to rethink dressing up as ethnic stereotypes for Halloween.
Sure, you can't deny they have a valid point, but when left to the devices of internet geeks with some photoshopping skills, this otherwise serious campaign has now turned into a pretty hilarious series of parodies that have become insanely viral.
Hey Daleks and Dracula don't like to be stereotyped either. Equality for all, man.