The one thing I've learned is that being good in martial arts doesn't make you invincible, either. I just give my clients better tools--and I tell them to stay out of saloons.
Agreed. To me, rule #1 is stay away from "bad places." If I feel like I "need" a weapon to go somewhere, I try not to go.
Rule #2 is to never underestimate an attacker, and to give it all you have in a life or death situation.
Rule #3 is to always be better armed that the other guy