He could be angry. Hogwarts is a place he loves and to see it in an abused state in a fanfiction would likely make him mad.
It could be very distressing for Harry. He might feel a sense of responsibility to do something about it, like trying to find the author to offer help or support. Maybe he would also be shocked at how some people can imagine such dark things happening in Hogwarts.
Some might be shocked and sympathetic. For example, Hermione would likely be very empathetic and immediately start thinking of ways to help Harry. She might offer her support in terms of studying magic that could protect him or just be there to listen.
They would probably be shocked at first. I mean, Hogwarts reading fanfiction? It's a strange concept. But then they might be really curious about what Hogwarts is reading. They could try to get their hands on the same fanfiction to see what all the fuss is about.
In this fanfiction, the students' reactions would be diverse. The Gryffindor students would be especially proud to have two of their house's greatest heroes as teachers. They would be full of enthusiasm in class. Some Hufflepuff students might appreciate their down - to - earth nature and the practical knowledge they bring. Ravenclaw students could be interested in picking their brains about the more complex aspects of magic they faced. Slytherin students, while some might be initially skeptical, would soon be won over by their competence. Harry and Ginny's presence would bring a new energy to Hogwarts, and the students would be at the center of this exciting change.
There would be shock and disbelief. The wizarding world has always seen Hogwarts as a symbol of hope, knowledge and safety. If Harry destroys it, many would be in denial at first, thinking it couldn't be true. Wizards and witches from all over would come to the ruins, trying to figure out what had happened.
Hogwarts as a whole might have a complex reaction. The students could be divided in their feelings. Some might be outraged, feeling that it goes against the essence of the story they love. The professors, on the other hand, could see it as an opportunity to teach about the power of imagination and the fluidity of storytelling. They might encourage students to write their own responses to these fanfictions, either in agreement or in opposition, to promote critical thinking skills.
Flitwick might be quite intrigued. He loves magic in all its forms and fanfiction would show him new and different ways magic could be used in the Harry Potter world. He'd be interested in the creative spells and concepts that the fans come up with.
They would also be very protective. Tony Stark, for instance, would use his wealth and technology to give Harry a safe place to stay. Steve Rogers would offer his moral support and train Harry to be strong both physically and mentally. Natasha Romanoff would teach Harry self - defense skills. All of them would work together to make sure Harry never gets abused again.
It could lead to a new adventure for Harry. He might decide to fight against the abusers and protect the students, which would add a new layer of conflict and action to the story.
In some fanfictions, Harry might discover that students at Hogwarts are being abused by certain dark forces or corrupt individuals. For example, there could be a fanfic where a new dark wizard has infiltrated the school and is using dark magic to mentally or physically abuse students. Harry could discover this through seeing the strange behavior of the victims or finding some clues around the school.