Fan Fiction Problem

Someone recently brought to my attention that because I included Fan Fiction in my story, it does not seem right. I know what Fan Fiction is and I am well-aware that some could write a story including my work. At the same time, I already created the idea. Even if you write a Fan Fiction about my work, I have already included it in my work. In fact, you can only write about it because I have already dictated that you would and could. I created that possibility for you. So no matter what you think, you might as well state that I am that equation above God that has simply allowed you to write that story. Even if you try to write something that states that it was done before me, the fact remains that the thought and possibility came from me to even allow that. In essence, you have already become part of my work without you even knowing it because I created it... not you.