Well, first of all, it's completely out of character for Luffy. He is a character full of innocence and is mainly focused on his adventures and his crew. Such a fanfiction misrepresents his personality.
There may be some very niche and inappropriate fan creations out there. However, the mainstream 'One Piece' fandom should focus on the real values of the story, like the bonds between the characters, the exploration of the Grand Line, and the various challenges they face. This kind of inappropriate fanfiction is not worthy of promotion.
It's immoral. The Harry Potter world is a magical and innocent - themed universe created for a broad audience. Sexual fanfiction defiles this concept.
It goes against the established character personalities. Hermione is a smart, strong - willed Gryffindor who is constantly at odds with Malfoy, a Slytherin with different values. Their relationship in the original is not at all conducive to such a situation.
One major problem is that it violates the essence of the two original franchises. Naruto is about ninja, friendship, and growing up, while Star Wars has its own set of values and stories. Combining them in such an improper way is disrespectful to the creators and fans of both.
One major problem is that it violates the family - friendly nature of the Naruto franchise. Naruto is aimed at a wide range of audiences, including children, and such explicit content is inappropriate.
One problem is that they are from different fictional universes. Naruto's world has its own set of rules, characters, and themes related to ninja life, while Bastila is part of the Star Wars universe with its own complex lore about the Force and galactic politics. Combining them in a sexual way is a very forced and inappropriate mash - up.
One problem is that it goes against the character traits of Hermione. She is a strong - willed, intelligent and good - hearted character who is firmly on the side of fighting against Death Eaters. Having such a relationship with a Death Eater completely distorts her character.
Well, it can be a problem because it might attract the wrong kind of attention. Instead of focusing on the positive elements of the Harry Potter universe like the magical adventures and the growth of the characters, it takes a very inappropriate turn. Also, it may not be suitable for younger fans who are a large part of the Harry Potter fan base.
One major problem is that it's inappropriate. It can make the original story's fans feel violated. Also, it may not be in line with the values of the original work. If 'Jessie' is from a show aimed at a certain audience, this kind of fanfiction goes against the intended audience's expectations.
It could face legal issues depending on the source material and its copyright regulations. If it goes against the moral or ethical guidelines set by the original creators, it might be challenged. Also, it may not be welcomed in mainstream fan spaces as it can make the overall atmosphere uncomfortable for many. This type of fanfic can also lead to a divide among fans, with some supporting it and others strongly opposing it.