The author here knows what they're talking about, and while not explicitly saying it, they're saying there will be more Luigi's, Adjusters, whatever attention grabbing description you like.
More business execs will be recognized as the tyrants they are, and shot. Because the entire world just taught all the school shooter types that shooting a business exec will turn you into a folk hero. It will get you fame and admiration. It will get people trying to send you money for your legal defense. It will get you people spreading the word about jury nullification to use the system against itself.
This month taught would be school shooters to instead go for board members, ceos, and billionaires. And it's a far better lesson.