Rowling’s attempts to silence and dismiss her critics demonstrate the uneven balance of power between authors and readers. As is shown above, Rowling has spent considerable time and effort cultivating a specific type of fandom—one that bows to her interpretive whims—and quashing dissenting voices and movements.
It's also worth noting she has taken fanfiction or theories and claimed them as her original ideas, trying to reclaim or take back control of her books. Although she created the books, they aren't hers anymore. As stated in the supplemental reading, “She’s going to get left behind in history…If she had never joined Twitter and just stopped adding after the final book was published, she would be idolized.” I think many of her fans, have already left her behind.