Maybe if Dad had done a better job of teaching his kid the fundamentals he wouldn't have felt the need to coach from the sidelines.
There is little more frustrating than being a father and having some pencil-necked weenie ignore reports of bullying day after day, unless you are the victim himself.
At some point, the school was a dismal failure at taking care of the problem, so the kid did the job. I can see dad cheering that on after heaven only knows how much BS, whether it seems tacky from the cheapseats or not.
Dad couldn't do anything directly, and no matter how tacky it sounds, it exposes the level of dad's frustration, too.
The failure isn't the father, it is the d@mned school system hiding behind ineffective "anti-bullying programs" and "conflict resolution" which did nothing to curb the abuse which led to the boy fighting back.
The judge is taking this out on the wrong person, imho. Where were the people "in control" of the school? Who cites them for allowing the man's son to be abused by the bully?