The weakest dog barks the loudest. When I use to take Tae Kwon Do, it was drilled into our head that the only time we fight is when our life or the life of our classmates/friends/loved ones are in danger. Starting/provoking a fight would be deemed a shameful act that would ruin the reputation of our dojo and the "natural balance" of things. I first handily saw many times the consequences of tarnishing the image and name of our dojo.The most savage men I know are the most chill.
It was controlled and owned by a true South Korean TKD grandmaster and his children. They would literally tell you to put your chest protector on and they would lace you with round house kicks and front kicks from hell if they found out you brought shame to their name. Have you ever been kicked by a 5'4" South Korean girl who is a 4th degree black belt just because you forgot to bow while entering the dojo? I have, let me tell you it ain't pleasant, the chest protector doesn't do shit after the first two kicks from hell.