im sorry, but i have to go with the ninjas on this one.
you just dont see the ninja. the run up behind you and slit your throat. you have to go with them or they'll shank you with their sword.
whereas if you dont vote for pirates, well you'll have a drunk man who you can hear singing terribly from a mile away, and you can smell him from about the same distance. so easy to run away.
and dont say pirates have ships, cause ninjas dont care. the run on water. i dont care what the mythbusters have to say, the mythbusters may be absolutely awesome, but they aren't ninjas, and so they dont have super ninja powers.