That's right folks.  That's probably the best advise for any ninja out there in the world.  I think that is actually rule 4 in the Ninjaism handbook.  You should pick it up, it's a great book. 

I'm actually a ninja and have been going on 6 years.  I learned from Dave's Ninja School in West Virginia.  I bought his video and learned so many new ways to be, act, and fight like a ninja.  Here is a brief example on what to expect by picking up Dave's Ninja School video.  You will learn quite a bit and good luck.  Always remember rule 4, Don't go ninja on nobody that don't need ninja'in!