I have to agree with the common consensus here, The Art of War is a good book for the strategist but a great deal of the content simply doesn't apply to airsoft, sans the troop movement and concealment. However, most of that is also used in the terms of hiding entire regiments instead of, say, a fireteam sized force. I do think some of the stuff is useful, like looking for wildlife signs so show where enemies are (as in seeing a flock of birds immediately take flight could mean enemy movement startled them).
Back to deception: I have done a few very, very lightly deceiving things. For instance, if there is a patrol or small group of enemies passing near me, I will turn so that they cannot readily see my armband if there is significant chance of me being caught even though it is plainly visible from a certain point of view. Also, at a paintball scenario I was once deep behind their lines and I was crawling up on a group of 6 guys casually chitchatting. Upon hearing crackling twigs behind me, I slowly slid my weapon (with blue ribbon attached) under me as they called "RED OR BLUE!?!?" over and over. Turns out they were screaming at the cameraman who just wanted a photo op.
