Well if the Head Official did not see it as a problem and you did not see it as a big enough problem to ACT, then since I was not there, I will assume it was not really a problem. If you think it was a problem and did nothing then by not acting you supported the action.
There is no question as to where I stand when I see something wrong, I act immediately, regardless of who is present. If I see something questionable, I will let it go while watching intently. Parenting is not black and white. How you handle your childs upbringing and how I handle mine may be two totally separate ideas. That doesn't make one right and one wrong, just different. Be careful judging, you do not know the entire situation.
I remember the last time I physically spanked Jake. It was after the State Finals match of 8U. Jake lost in OT. Jake was upset as kid's are. I tried to comfort him and talk to him but he swore the official had cheated. The official made the best call he could and it just didn't happen to go our way. I tried to talk to him and he continued to scream he had been cheated. I swatted him 3 times and told him to drop it. After he calmed down we discussed it and everything worked out. I'm sure to some parent that did not know what was going on, they thought Jake got the swats for losing. He got the swats for being a bad sport, not taking responsibility, blaming someone else, and throwing a fit.