In the photos I've seen, the two girls in the middle had * (asterisks) on their shirts. So technically, they didn't even spell out the dreaded "N" word.
Maybe they're fans of Danish pixies. (Nisser).
OK, probably not.
But films like "The 40-Year old Virgin" have scenes where they scream the N-word about 20 times in 30 seconds. Rappers have 1000's of nasty lyrics using the word. But all that's cool because they're actors/musicians and make lots of money. Or because it's "Art", and their freedom of expression is more important than other people's.
Or something.