Well, 'chopper fanfic' is basically fan - made stories that revolve around the concept of 'chopper'. If 'chopper' is a vehicle, like a motorcycle (which is often called a chopper), then the fanfic could be about cool rides, customizations, or races involving these choppers. It all depends on what the 'chopper' in question represents in the context of the fanfic.
No, in the traditional sense, Chopper, if you mean the character from 'One Piece', is a reindeer and doesn't have the physical ability to read novels as humans do. However, in a more imaginative or fictional scenario within the One Piece world, perhaps with some magic or special ability, it could be possible, but there's no such indication in the original story.
Hard to say. It could be associated with a minor character whose background wasn't fully explored. Or perhaps it was just a random prop without a specific owner.
Yes, Chopper might like to read stories. Maybe he likes adventure stories as he is quite an adventurous character himself. Stories about exploring new islands or facing big challenges could be his favorite.
It depends on how it's written. If it's written in a way that is just for shock value or to promote violence in an inappropriate way, then it's not appropriate. But if it's part of a plot that is exploring complex relationships or character development in a non - glorifying way of violence, it could be considered within the realm of acceptable fanfiction.
In a community - based '3 slaps true story', the significance of the three slaps could be related to the norms and values of that community. For instance, it could be a way to enforce a moral code. If someone broke an important rule, the three slaps could be a form of public shaming or a way to make them realize their mistake. Without knowing the details of the story, it's all just speculation though.
Probably not as popular as some of the more mainstream Naruto fanfics that follow the typical romance or adventure themes. However, there might be a niche group of fans who enjoy exploring these darker and more controversial plotlines. It depends on how much the Naruto fan community as a whole is willing to accept deviations from the original story's tone.