This is a terrible ruling that basically asserts that kids are constantly on school property no matter where they are at what time of day or night.
They tried this BS where I live. If my son for example was in a fight at the movies on Friday night, Monday morning he could be brought down to the principal’s office. Where he might get detention etc. Well I never heard of it ever coming to that. I believe in my town’s case it was because after school there would be big fights in the local parks. You couldn’t go to the movies over the weekend because of the behavior of the teenagers. It was a mess in our shopping centers with teens fighting and annoying the elderly. It did seem to make the teens think more as it has gotten a bit better. Since my town has this ruling or law I have never once heard of it being used. Maybe it was to make the teens aware that what they did on their time could affect their school time, I don’t know. I would have fought it had my son ever been affected by it.