There are some things we do, and some things we just don't do. It's an unwritten rule at times. In sports, there is an unwritten rule that says when a team is winning 41-17 with four minutes to play in the game, you don't run to the center of the field after a touchdown as a way of rubbing it in the opponent's face. There is no place for this kind of reaction at any sporting level. Emotion is one thing.
Every athlete needs to play with emotion.
After all, that's what drives them, that's what gives them the desire to win. However, instigating a fight after the game has long been decided does not fall in the same category as emotion. After Owens made his way to the midfield star for the second time, Cowboys safety George Teague tackled him and started a melee that resulted in his ejection and Owens picking up an unsportsmanlike conduct penalty. If Owens gets a penalty after his first trip to midfield, there's a chance none of that will happen. If Dallas running back Emmitt Smith gets a penalty for his forceful slamming of the ball at midfield after his touchdown in response to Owens, nothing happens.