To me, I agree with Bear... it is generally an accepted truth that it is a "Good Thing" to be bashed less.
Real world, start of confrontation having arms simply in front of you - not necessarily even standing in a guarding posture (ala boxing/fighting stances) is a much more survivable position than to be caught witht he hands down at the sides. Shoot, if nothing else, a person has to cover a little extra distance and get over/under/around/through the arms. Basics, to me. Hands up, arms in front, chin down, eyes open, weight on balls of feet and knees bent..... 1st day in class stuff, but very very important, and oftentimes the 1st things forgotten when le caca strikes ventilateur.