The quality and appropriateness of any fan fiction depend on the individual author and their intended audience. Some fan fiction can be well-written and entertaining, while others may contain offensive or controversial content. Without reading the fan fiction in question, it is difficult to determine whether it is a "good" or "bad" work.
It's always advisable to exercise caution when consuming fan fiction, especially if it contains potentially sensitive material. You may want to consider reading reviews or opinions from other readers to get a sense of its content before deciding whether to engage with it.