LMAO excellent question! I got caught up in that as well.. Everywhere you look in the porta-shitters there's "ninja fact # whatever". It originates with a website
www.realultimatepower.net. It's hilarious! It's obviously a spoof site, but a lot of people have written the site with hate mail.... The site made it's way around Iraq by word of mouth, and people elaborated on it with pirate and samurai references.