Maybe the lack of reaction in Harry Potter fanfiction is due to a lack of promotion. There are so many fanfictions out there that if an author doesn't share it widely on relevant platforms or communities, it may go unnoticed. Additionally, some fanfictions might be too niche in their themes. For example, if it focuses on a very minor character's backstory that most fans aren't interested in, it won't get much of a reaction.
Most fans would be disgusted. They've grown up with the story of Harry Potter as a symbol of good, and this kind of fanfiction completely undermines that. It would be met with a lot of criticism and probably calls for it to be removed from any platforms where it might be posted. The fandom values the integrity of the original story, and this is a blatant violation of that.
No, it's not likely to be popular. Harry Potter fans usually look for fanfictions that expand on the magical elements, the lore, and the relationships that are central to the books and movies. The concept of 'lack of lamb sauce' is so far removed from what is considered 'core' Harry Potter content that it would be a surprise if it had gained any significant popularity. It might be something that a very small group of people with a very unique sense of humor or creativity might be interested in, but not the general Harry Potter fan base.
A great Harry Potter reaction fanfiction might focus on how the teachers at Hogwarts react to a new educational reform from the Ministry of Magic. Professor McGonagall might be resistant at first, as she values the traditional ways of teaching, while others like Professor Flitwick might be more open - minded and eager to try new methods.
They might be quite amused. The Marauders were a mischievous bunch, and seeing different interpretations of their world in fanfiction could be a source of great entertainment for them. They'd probably laugh at some of the wilder ideas and might even be impressed by the creativity of the fans.
Well, it would be quite an odd scenario. Harry Potter, being from a world of magic, might find the scientific concepts in Jurassic Park fanfiction really strange. He'd probably be fascinated by the idea of dinosaurs being brought back to life through science rather than magic.
First, work on the plot. Add more interesting twists and turns. For example, instead of a typical 'good vs evil' story, introduce a moral dilemma that makes the characters question their actions. Second, improve the writing style. Use more vivid descriptions. Instead of just saying 'the room was dark', say 'the inky blackness of the room seemed to swallow all light, leaving only a sense of foreboding'. Third, make sure the characters are true to their original selves and develop them further.
Well, Lily Evans reading Harry Potter fanfiction would be an interesting scenario. She'd be seeing her own world and the people she knew from a whole new perspective. She might find some fanfictions that really capture the essence of the relationships she had, like her friendship with Severus Snape or her love for James Potter. But she'd also come across some that are completely off - base. It could make her reflect on how her actions and choices in her real life have now become a source of inspiration or speculation for others. She might even start to think about how she could have done things differently in some aspects of her life based on the different scenarios presented in the fanfictions.
He might be really confused at first. Harry Potter's world is full of magic wands, spells, and Hogwarts, while Star Wars has lightsabers and the Force. But he could also be intrigued by the different kind of space - faring adventures in the Star Wars fanfiction.