1) Kata was never meant to be a choreographed fight against multiple opponents. I've said this 264 times (a million seemed to be exagerating)
. The idea is to pull individual pieces away from the kata & then train, train, train. If you do that, people may think you're doing Krav Maga.
2) A good Offence is the best Defense. (nuff said)
3) We need to get over the notion that a pre-emptive strike is an attack. Following our consciences to be the "honorable" ones, we can end up on the knuckle side of a right hook. I like to think in terms of 3 basic defensive maneuvers:
a) Go-no-sen: Block & attack
b) Sen-no-sen: Block w/ attack
c) Sen sen-no-sen: stolen timing (pre-emptive strike)
Most of us would do well to utilize Go-no-sen in an actual SD scenario. Some may manage the next higher level of SD, Sen-no-sen, to change the course of the aggression. A very few who aren't hobbled by nerves, inexperience or surprize could possible deal w/ an attacker via Sen sen-no-sen.
This highest level has a nearly "psychic" quality that we all strive to acquire through years of training. This is what Funakoshi was referring to.
Now if you approached that guy in line who was "looking @ you funny" & kicked him in the marbles, don't look to me to back-up your Sen sen-no-sen arguement. Not the same thing.