Famed “Harry Potter” author J.K. Rowling on Thursday shut down a critic who claimed that trans-identifying males weren’t “a threat” to women when they use female restrooms.

Rowling, who has faced numerous attacks from leftist activists for her support of biological women, tweeted a screenshot of a message she received from someone attempting to make an argument supporting the notion.

The screenshot read, “It’s sad really.That a) you think a rapists is going to be stopped by a sign on a door. They won’t. And they don’t give a sh*t generally about boundaries/’safe spaces’…It’s kinda a key characteristic of rapists. B) that trans people universally represent a threat. They don’t.”

Rowling replied, “Never forget: it’s far too unsafe for trans women to use men’s bathrooms/changing rooms, because they might get assaulted.”

“However, it’s completely fine for any man who identifies as a woman to use women’s bathrooms/changing rooms, because rapists will rape women anyway,” she added.

Never forget: it's far too unsafe for trans women to use men's bathrooms/changing rooms, because they might get assaulted.

However, it's completely fine for any man who identifies as a woman to use women's bathrooms/changing rooms, because rapists will rape women anyway. pic.twitter.com/7pVPRGh6pI

— J.K. Rowling (@jk_rowling) June 15, 2023

Reading through the comments, many social media users were supportive of Rowling’s post.

Im sorry, but if you go around calling women expressing fears around mixed bathrooms etc "transphobic" and to "get over it" it's an instant block from me. pic.twitter.com/DtXV88YR6q

— SaintedSinner (@sinner_sainted) May 12, 2023

One account posted, “So many young people have been led astray. One hopes there won’t be hell to pay in the future, but I kind of doubt it.”

So many young people have been led astray. One hopes there won’t be hell to pay in the future, but I kind of doubt it.

— Dr. Dave (@pensiverepublic) June 15, 2023

While another tweeted, “Quite right. Prosecutors everywhere have seen men going into women’s bathrooms as a criminal problem for many decades, if not more than a century. Any Leftists and trans-advocates who deny it are lying. Not mistaken. Lying.”

Quite right. Prosecutors everywhere have seen men going into women's bathrooms as a criminal problem for many decades, if not more than a century. Any Leftists and trans-advocates who deny it are lying. Not mistaken. Lying.

— Argent Flexner (@ArgentFlexner) June 15, 2023

Rowling has been the target of transgender activists because of her numerous comments in defense of biological women.

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The author previously spoke out against the former Scottish female First Minister, Nicola Sturgeon, who in 2022 supported that government’s Gender Recognition Reform Bill.

Related: ‘Liberal Left All Her Adult Life’: J.K. Rowling Slams Idea She’s ‘Right Wing’