Iīve studied martial arts since I was 6. Although I also know some knife techniques and can hit a 2" circle with a stab, I usually donīt carry weapons. The posture and facial expression seems to give people a feeling that theyīll be better off not bothering me.
Of course some situational awareness helps to stay out of trouble in the first place.
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If it isnīt broken, it doesnīt have enough features yet.