Ninjas are fun . They go to school to learn the art of being sneaky . They typically handle jobs as spies , assassins , guerilla fighters and other covert operations . Ninjas do the stuff we aren't supposed to do and never talk about and as such a great deal of mystery and superstition has grown up around them . Ninjas aren't really EVIL , though the spin doctors might try to convince you otherwise and they are rather notoriously portrayed in villainous roles in moving picture shows . I like to think of them as Samurai Secret Agents , y'know James Bond without the tuxedo , traded in for a shinobi shozoko and tabi .