Stealth is a very important part! Black and face-coverings are worn at some but not all times. There is no strict rule regarding such a dress code! Additionally, I believe your refer to the "shuriken". The kunai is more reliable a weapon, but I carry as little on me as possible.

You as misinformed in some more aspects, I believe. Those who commit acts of piracy are among our enemies, yes, but there is no full-fledged war.