1. There are NO ninja songs.
2. There are NO ninja ships.
3. Ninjas come in, do it, and go out wihtout anyone even noticing...a pirate charges in with a bang, stays as long as he likes, then leaves with a BOOM!
4. Ninjas can't have a talking parrot.
5. Ninjas got no rythm
6. Pirates can wear an eye patch just for the fun of it, and no one will notice.
7. A pirate that loses a hand or a leg gets even cooler with a hook or a peg leg. a ninja just becomes a cripple.
8. Muskets >>> shurikens
9. "Yarr!" >>> "...(silence)..."
10. Jack Sparrow