Elon Musk’s X has enabled the Grok chatbot to be trained on data from any user. This feature is now on by default, which may breach EU rules. Deep within the settings of X, besides a check box that was already ticked, users spotted the following text: “Allow your posts as well as your interactions, inputs, and results with Grok to be used for training and fine-tuning.” This approach could violate the EU’s General Data Protection Regulation (GDPR).