No. Copyright law is important for protecting the rights of authors. Without it, there would be no incentive for writers to create great works that could potentially be part of a 'world novel'. It actually encourages the creation of quality works which could contribute to the richness of a global literary landscape.
It wasn't very common to see novels that destroyed the world, but there were some novels that did. For example, the main character in " The Dark Throne ", the Dark Abyss Warrior, once tried to destroy the entire world. Xiao Yan, the main character in "Battle Through the Heavens", had once thought of destroying the entire world. However, this was only a part of his goal. The plots of these novels were not real, but were set up to increase the twists and turns of the plot and suspense.
Some of Harry's friends could also be antagonists in this fanfiction. They might not understand his reasons for wanting to destroy the wizarding world and try to stop him. For example, Hermione, with her love for knowledge and the wizarding world's institutions like Hogwarts, would probably try to reason with Harry and, if that fails, might even fight against him to protect the world she loves.
It could also be a story where Harry has lost all hope. He has seen too much death and destruction in the wizarding world, from the war with Voldemort. He might think that the only way to end all the pain and suffering is to just end the wizarding world as it is. He could start by attacking the key institutions like Hogwarts and the Ministry of Magic.
One common plot point could be Naruto's sudden change in ideology. He might shift from being a protector to a destroyer due to some extreme event. Another is the reaction of his friends and former allies. They would be shocked and try to stop him, which could lead to some intense battles. And often, there would be a mysterious force or character behind his transformation.
It was indeed rare to see anime works with the theme of destroying the world. The following were a few more well-known works, among which there were also plots where male characters wanted to destroy the world:
1. Steins;Gate
2 Death Note
3 Death Note
4. The Rebel Lelouch (Code Geass)
5. Detective Conan
Attack on Titan
Of course, the plots and styles of these works were different and might not suit everyone's tastes. If you want to know more about world-destroying comics, you can search for relevant information or ask other anime enthusiasts.
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.
The power balance would be completely disrupted. Without the ninja villages, there would be no organized ninja forces. This could lead to smaller groups or individuals vying for power, causing chaos everywhere.
The tides would be severely affected. Since the moon has a gravitational pull on the planet, without it, the oceans would become very unstable. Coastal areas would experience massive floods and then receding tides like never before, which would disrupt fishing and coastal communities.
Yes, I recommend The Mad Emperor. The main character, Ye Tian, awakens his Martial Spirit and sings his way through the world, destroying the world with a single strike. I hope you like my recommendation.😗