Spelling Ninja

Our first entry in The Men's Room Diaries is this. "Ninga". Believe it or not, this was found in a stall is a national chain book store. You would think that someone who is so into ninjas that they would write it on a men's room wall, would take the opportunity of being in a book store to read a bit about them and thus learn how to spell "ninja." Maybe they just came in to use the restroom.

Establishment: Chain book store
Location: In stall, on door opposite toilet.
Medium: Ink, presumably ball point pen.