What if you find out that a student of yours or more than 1 uses their training to do bad things like bully people, get into fights etc. Would you still continue to train them?. If so then what would you do to fix that attitude of theirs?.
Also what if you have no specific proof but you suspect that a student of yours uses his training to get into fights with people due to his attitude etc. What do you do then?. I've known some guys who used their martial art training to get into fights with people during high school.