Well, it could be due to a complex web of motivations and storylines. Maybe she was manipulated or had a misunderstanding that led to such a drastic action.
It's hard to say for sure. It could be a symbolic act or tied to some larger conspiracy within the comic's universe. Maybe it was an accident or a deliberate act by a villain to create chaos.
It might also be a very extreme statement. Some people are very protective of the original Naruto work and view fanfiction as a sort of 'corruption'. However, fanfiction can also be a form of creative expression for fans who love Naruto and want to explore different scenarios or relationships within the Naruto universe.
Well, it could be due to a build-up of frustration and a sense of hopelessness in trying to reform the Joker. Also, maybe in that particular comic's storyline, the circumstances are extreme and Batman makes a desperate choice.
There's no official confirmation that Cole Sprouse reads fanfiction. He might be too busy with his acting career and other personal projects to delve into fan - created stories about himself or other works. However, some actors do enjoy seeing the creative interpretations of fans in the form of fanfiction, so it's not completely out of the realm of possibility.