No. Fanfiction is meant to be a celebration of the source material and its characters. Torturing a character in a fanfiction is not in line with this purpose. It can create a negative and uncomfortable reading experience. There are so many other positive and interesting aspects of the characters and the story world that can be explored in fanfiction rather than focusing on torture.
Educating the fanfiction writers and readers is important. Make them aware of the negative impacts of creating and consuming such disturbing content. For example, by having discussions on the ethics of fanfiction writing in relevant forums or groups. Also, positive promotion of alternative, more positive forms of fanfiction can help shift the focus away from such dark themes.
In the case of 'sakura tortured fanfiction', it could imply a piece of fan - made literature. It might be that the author of this fanfiction wants to explore the darker aspects of the character Sakura. They could be putting her through physical or mental torture in a fictional scenario, perhaps to show her strength in the face of such adversity or to create a very intense and emotional story.
I don't think it's a common type of fanfiction. Fanfiction often includes a wide range of themes from romance to adventure. The idea of a character being tortured, in this case Sakura, is a very specific and rather dark theme. It may only appeal to a small subset of fans who are interested in exploring such extreme and often disturbing storylines, so it's not likely to be a widespread type of fanfiction.
Appropriateness is subjective to some extent. While some people might be interested in exploring the darker sides of a character like in 't challa gets tortured fanfiction', others may find it offensive or disturbing. If the fanfiction contains excessive violence and torture without any redeeming narrative or moral exploration, it's likely not appropriate.
I'm not sure specifically as there could be many different interpretations of such a fanfiction. It might involve a character named Neal facing some form of extreme distress or harm within the context of a fictional story created by fans.
It's not extremely common, but it does exist. Some fans are interested in exploring how Naruto would react under extreme duress. However, many other types of fanfiction, like Naruto's training arcs or his romantic relationships, are more prevalent. But still, for those who like a more edgy and intense story, 'naruto gets tortured fanfiction' can be appealing.
I'm not sure specifically as I haven't read that particular fanfiction. But generally, it might involve Ginny facing some form of cruel treatment by the Carrows in a fictional and often dark scenario created by the fanfiction writer.
It could be the traditional villains from the original story. Maybe some of the old enemies of Percy who have a vendetta against him. For example, the Titans or some rogue demigods who oppose him for power or personal reasons.