"is it wrong to write xyz in fanfics?"
I got asked this question every single day on this blog. and my answer will always stay the same: as long as it's fiction and as long as you're not hurting anybody in real life, NOTHING you put in fanfics can EVER be wrong.
you cannot apply real-world moral compass on FICTION.
YOU as the writer have complete and total right/freedom to write WHATEVER YOU WANT. HOWEVER YOU WANT.
that's the whole point of fanfics: authors have the power, control and freedom to create their own world. no matter how messed up or disgusting or morally wrong it is, FICTION WILL ALWAYS STAY FICTION. a person's real-life moral compass can never ever be judged by what type of fiction they create and/or consume.
fanfic is creative writing and creative writing is a form of art. and the thing about art is that it doesn't have to always be rainbow and sunshine. it can be macabre and dark and brutal and ugly. and it's still a work of art that is just as valid and valuable.
YOU as the writer have all the power, rights and freedom to literally write WHATEVER YOU WANT. HOWEVER YOU WANT.
I am a stranger. people on the internet are strangers. YOU as a fanfic writer write FOR YOURSELF AND YOUR OWN ENJOYMENT. you do NOT need my opinion or permission when it comes to YOUR OWN HOBBY AND FREEDOM.
you do not need anybody's opinion or permission when it comes to YOUR OWN HOBBY AND FREEDOM.
"is it wrong to write xyz in fanfic" ask yourself if you are hurting anybody in real life by doing so or not. if the answer is no, then it is never ever wrong.
write whatever you want. however you want. no matter how messed up or disgusting or morally wrong it is. as long as it's fiction and as long as no one in real life is being harmed, it literally is never ever wrong.
please stop seeking strangers' opinions or permission when it comes to your own rights and freedom to create.