You’re playing a game with a bunch of kids who are on average 6-8 years younger than you are. They all look up to you, or at least to some extent think that you have your life more figured out than they do, and you decide to play a pretty friendly game. A game that it would be hard for anyone to get in an argument over.
About halfway into this game, you start to get frustrated because their team keeps doing things that you think are right on the verge of being illegal. They maybe aren’t completely, but it’s also not like you’re in league, so there are no refs to keep an eye on it and call it if there is any nefarious activity.
All of a sudden, one of the younger kids does something that you know is completely illegal. You’re across the field, seeing that the kid thinks he got away with his cheat, and you scream his name over the field saying that he can’t do that and that it’s illegal.
There’s a lot going on, so even in the shouting, only about 50% of the kids face to look at you yelling, but in an instant, right after the gratification, you felt from seeing this kid cheat and calling him out, another instant later you feel shame and remorse for being so competitive that you thought it was more important to call this kid out right here and now in order that you might win the game rather than talking to him after the game one-on-one.
Now, instead of helping to teach this kid about the bad things cheating produces, it just makes him feel maybe some anger, and maybe some shame because he’s been called out in front of his friends.
Never let competition get in the way of your relationship and ability to communicate with others.