First, I want to say honors classes are a privilege not a right. Many school districts treat them like college level courses and hold the kids to a higher standard.
Second, in college, at least mine, there is a zero tolerance policy on plagiarism. A student is supposed to be at minimum failed in that class, at maximum they will be put on academic probation or suspension. Most professors try to help the students out by failing them on that paper and making them rewrite it. Although some students make a habit out of it and are gone quickly.
His son got punished and deserved it. In my opinion this is stealing. You are taking someone's ideas and using them as your own. It would be no different than taking their tv then watching it in your house.