I be a good ninja...
Look-it. I took "The Good Ninja-Bad Ninja Quiz" from EnterTheNinja.com and got certified. So go on, click the pic to get typed.
While y'all are doing that, I'll be brushing up on mah ninja etiquette.
Ninja never bring a gun to a sword fight. Ninja don't use guns. Ever.
The only way to end a ninja clan is to break the head ninja's sword.
Ninja never show their real face. If the need to show a face arises, it should be a very shiny mask. This is the only possible substitute.
Bullets can't kill a ninja. Even 1 million bullets can not kill a ninja. (See the training video "Ninja 3: The Domination" for demonstration!)
When attacking a single ninja with a clan of ninja (more than 4, less than that is only a posse), it is proper ninja etiquette to fight with only one ninja at a time. This makes for a much nicer fight to the death.
NOTE: if you are planning to fight the mack daddy ninja, be sure to bring lots of lesser ninja to warm him up for your grand entrance.