“Harry Potter” author J.K. Rowling planted a red flag on the clear message radical trans activists are sending to women and girls when they demand access to single-sex spaces that are meant to be for women only.

Rowling, whose support for sex-based rights and privacy has often put her at odds with the trans community, said that the obvious takeaway was as simple as it was insidious: women, to them, were little more than costumes that afforded the wearers everything that went along with actually being women.

“The message to girls everywhere: you are a costume that any man can put on. Once he’s wearing it, he gets to take your rights,” Rowling’s post was concise.

The message to girls everywhere: you are a costume that any man can put on. Once he’s wearing it, he gets to take your rights. https://t.co/BlQvL8bbyR

— J.K. Rowling (@jk_rowling) August 22, 2025

The article Rowling shared to back up her statement was published in The Times and detailed the story of a man who was headed to a women’s prison in Germany just months after claiming that he was, in fact, a woman.

Marla-Svenja Liebich, 53 — who went by the name Sven until December of 2024 — was the leader of a banned local Nazi group called Blood and Honour in Saxony-Anhalt. He has campaigned for Russian President Vladimir Putin and cheered on the war against Ukraine.

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Liebich was arrested on several charges including inciting hatred, criminal insults, and “trying to sell a baseball bat over the internet as a ‘deportation aid.'”

Despite previously claiming that trans-identifying people were “parasites on society,” Liebich made use of a recently-changed policy in order to adopt his new identity. While in years past, trans-identifying individuals had to present evidence from two doctors in order to change gender on official government documents, a new policy adopted last November allows individuals to simply fill out a form at a local government office.