The meanings of words can change over time. When the term terroristic threat initially came into use in the legal system in New Jersey, it was generally associated with allegations of domestic violence. That's changed in the past 15 years, though. Now, charges of making terroristic threats can stem from many different actions and you don't necessarily have to be an adult to be accused.
It might not take much to trigger an arrest on a charge of battery in New Jersey. Throwing and landing a punch might be enough. The possibility of being charged with assault can take even less. All you have to do is make a verbal threat. If the person it's aimed at fears bodily harm, a charge of assault could follow.
Back in the day, the rules of etiquette required that if you got into a fight in the schoolyard and a teacher broke things up, you would shake hands with your rival. An apology might even be called for. Does that ever happen anymore?