Yes, I wore a costume on Purim and hosted a party. Most of the people who attended also wore costumes. Everywhere that Purim was being celebrated, people wore costumes. It was Purim. People dress up.
I am intrigued that anyone who understands Purim—or for that matter understands me—would have a problem with this. This is political correctness to the absurd. There is not a prejudiced bone in my body.