It's a very controversial theme. Naruto is a character known for his will to protect and his bonds with the villagers. In the original story, he wants to be recognized and respected by the villagers, not harm them. So such a fanfiction goes against the core of his character, which is why it would be considered quite controversial.
Well, it's extremely controversial. Naruto's whole journey is about overcoming the hatred and prejudice of the villagers towards him. He has a deep connection to the village and its people. The thought of him killing villagers in a fanfiction completely subverts the positive growth and values that Naruto represents in the original story. It would also be a very dark and disturbing take on the character.
It's a rather controversial theme. In the original 'Naruto' series, Naruto and Sasuke are friends and rivals. Their relationship is complex and central to the story. So, a fanfiction where Naruto kills Sasuke goes against the essence of their bond. Many fans who love the original dynamic would find it unacceptable as it's a major deviation from what they expect and cherish in the Naruto - Sasuke relationship.
This type of fanfiction is very controversial. Naruto represents hope and growth in the series. Kakashi, as his teacher, is supposed to guide and protect him. Having Kakashi kill Naruto would completely disrupt the established character arcs and the overall positive message of the 'Naruto' story. It might only appeal to a very small subset of fans who are interested in exploring extremely dark and alternative scenarios.
Well, it's not common at all. Naruto's mother is a heroic figure in the Naruto universe. She saved Naruto's life at the cost of her own. In fanfiction, most writers prefer to explore positive aspects of the Naruto world or create new adventures while staying true to the essence of the characters. Writing about Naruto killing his mother would be seen as a desecration of the character relationships and the overall positive message of the series.
It's not that common. Most fanfictions tend to follow the general positive or at least not so extreme paths for the main characters. Since Sasuke and Sakura are main characters, having her kill him would be a huge deviation. However, some writers might explore this in a 'what - if' scenario, like if Sakura was mind - controlled or in an alternate universe where their relationship turned out completely different.
It's not common in the sense that it goes against the norm. In most official Batman storylines, Batman is the symbol of justice that endures. However, in the realm of fanfiction, some writers explore this dark and edgy concept to explore different character arcs, power dynamics, and moral ambiguities. It challenges the established order and makes readers question their assumptions about the characters.
It's controversial. The Dursleys were Harry's only family (albeit a horrible one) in the Muggle world. Killing them in fanfiction is a very dark take. It's not common because most fanfiction either focuses on the magical adventures, Harry's relationships at Hogwarts, or redeeming the Dursleys rather than such extreme and immoral actions. The original series promotes forgiveness and growth, not revenge - killing.
It's a very controversial theme. In the original 'Harry Potter' series, both Snape and Dumbledore are complex and important characters. Dumbledore is a mentor figure to Harry, and Snape has a very complicated relationship with Harry as well. For fans who love the original story, the idea of Harry killing them goes against the essence of the characters' development and the overall moral and emotional fabric of the series.
It's controversial. Naruto and Sasuke have a long - standing relationship that fans have come to expect a certain development from. Naruto has always been trying to save Sasuke, not kill him. In fanfiction, while there is creative freedom, this concept is against the grain. But some writers might use it to show a extreme breakdown of their relationship due to some unforeseen and very dark circumstances, like if Sasuke was completely consumed by evil and there was no other way. Still, most fans would be shocked by this idea.
It's controversial. Naruto's whole journey in the original series is centered around protecting Konoha and its people. A fanfiction with him killing Konoha completely subverts that. But it could be an interesting exploration in terms of alternate universes. Still, in the general Naruto fandom, it's not a popular or common theme as it clashes with the established character arcs and the overall positive image of Konoha in the original work.
It's a very controversial theme. In the Naruto canon, Kushina is Naruto's mother and they have a loving bond that is a fundamental part of the story. A fanfic with such a premise goes against the essence of their relationship. It would likely shock and upset many fans who are attached to the positive family dynamics in the original series.