Genetic testing company 23andMe updated its terms of service to prevent customers from filing class action lawsuits after a hack exposed personal information of nearly 7 million users. The new terms require customers to opt out in writing within 30 days to avoid being automatically opted in. The change has sparked outrage online, with many criticizing the company's move as an attempt to avoid accountability. The hack, which occurred in October, accessed sensitive user information including photos, names, and geographical location.