The Ghibli trend, where millions of people use OpenAI's AI chatbot to create Studio Ghibli-style art, has raised privacy and data security concerns. Experts argue that users' facial data could be used to train AI models, potentially leading to permanent loss of privacy and potential cybercrimes like identity theft. The trend has also boosted the popularity of OpenAI's AI chatbot. Despite these concerns, the popularity of the Ghibli trend has led to a global increase in AI chatbot usage.