It can be considered inappropriate. Fanfiction is a form of creative writing that often has a wide readership. Depicting suicidal thoughts related to a character like Amy Fleming can be disturbing for many readers. It also raises questions about the mental health implications within the fan community. While some might argue it's a form of artistic expression, it should be handled with great care to avoid causing harm or normalizing such dangerous thoughts.
It could be concerning. Fanfic often reflects the writer's thoughts or interpretations, and if it involves suicidal thoughts related to a character like Amy Fleming, it might be a sign of exploring darker themes in a fictional context. However, it's also important to note that it could potentially be a way to work through difficult emotions in a creative way, as long as it doesn't promote or glorify suicide.