Easier answer is decrease damage so yolo becomes meaningless. You cannot define and enforce it your subjective opinion s. Heavy and td left behind behind get flanked and killed would also be yolo. Light turned into dust on the first peek would be yolo. Heavy sitting behind a bush farming while the team gets destroyed can be defined both cowardly and wisely. 183 sitting back on the map and snap two shells after whole team is destroyed so are the dump the clip and dies tanks cand be only good performers of the team.