flatbush27: I now see the problem.
In Flatbush, women wearing costumes causes undue attention, as the women there don’t wear costumes.
Outside Flatbush, wearing costumes on Purim is normal and does not cause undue attention.
As such:
In Flatbush wearing a costume may not be Tzanuah, but SJS & Oomis don’t live in Flatbush, so for them it is Tzanuah and Muttar!
Shalom Al Yisroel, Venomar Amen.