encouraging *good* behavior and sportsmanlike conduct *regardless* of mode or anything else

Sportsmanship is how you behave regardless of mode ... it is being gracious in both winning and losing. It is characterized by winning and not gloating over the victory ... yes, this means you don't act childish. When you lose, it means being congratulatory to the winning team. Saying "ez" when you win is childish and immature. If you disagree, check to see if you are being childish and immature ... you probably are. If you had a good set of parents, they would have taught you not to gloat in victory, nor throw a tantrum if you lose.

If someone points out that you are being childish, the appropriate response is NOT making excuses for that behavior. It is most likely "Oh, yeah ... I'm sorry, you're right. Thanks for pointing it out."

Don't act like a 3-year-old (or someone that was never trained by their parents in sportsmanship). If you played little league baseball, you probably learned better behavior. You can learn appropriate behavior ... but you can't if you won't listen. And it certainly doesn't help if you think "this is just normals" ... sportsmanship is not something you can put on like a hat ... it becomes who you are. Either you are a sportsman, or you are childish.