When you’re one of the best-selling authors of all time, it's safe to say you're not someone one wants to get into a war of words with.
However, some former Potterheads learnt that lesson the hard way.
After sharing an old tweet from the current US Vice President Mike Pence, Rowling’s accompanying bible verse started a huge Twitter firestorm.
After one such ex-fan tweeted at J.K. Rowling to say she had burned her Harry Potter books in response to the author's criticism of President Donald Trump, Rowling clapped back.
"Guess it's true what they say: you can lead a girl to books about the rise and fall of an autocrat, but you still can't make her think," she captioned a screenshot of the online message, which read, "just burned all my Harry Potter books after being a fan for 17 years. The Philosopher's Stone was one of the first books I EVER read. I'm upset it has to be that way.. You embarrassed me, disgusted me, and I will never read your work again."
This wouldn't be the first time Rowling annihilated a Trump supporter.