Brazil has blocked Meta from using social media posts of Brazilian users to train its AI models, causing the company to face fines if they do not adjust their privacy policy. The decision by Brazil's national data protection agency was made to protect the fundamental rights of affected users. Meta has faced similar scrutiny in the UK and EU, where it halted plans to use public posts for AI training. Concerns have been raised over Meta's use of children and teenagers' data in Brazil compared to Europe, sparking a debate over data protection measures in different regions. The company's push to use public posts for AI development has been met with backlash and regulatory action, presenting challenges for Meta's operations in various countries. The case highlights the importance of privacy laws and the global implications of tech companies' data practices.