"Wearing a headband with a piece of metal on it does not make you a ninja."
Otherwise known as "wearing street clothes and the headband thingie from Naruto does not make a Naruto costume.
"In the old days, ninjas who wore shiny things died."
Sparkly bits are cool... but not if you're trying to sneak.
Yeah, there were a lot of people with pseudo-Naruto costumes.
One day someone will explain to me what the excitement of walking around with a boken is. I see no reason to get into arguements with the staff over one's right to walk around carrying a stick.