Can companies legally use my personal data to train their AI models?

In many places, companies can legally use your data for AI training if you agreed to it in their terms of service, though this is becoming a major legal battleground. You know that long privacy policy you scrolled past without reading? That's often where the permission is buried. LinkedIn, for example, quietly updated its settings to automatically opt users into sharing their posts and activity for AI training, which sparked a lot of anger when people found out. The legal landscape is shifting fast. The EU's GDPR gives residents a strong right to object, and California's privacy laws offer some opt-out power. But there's no single global rule. A practical tip: don't just look for an 'opt-out' button in your settings. Sometimes the most effective move is to adjust your privacy controls to limit data sharing at the source, like setting your profile visibility or post audience. It's a bit like closing the curtains instead of asking the neighbor to stop looking. The real issue isn't just what's legal today. It's that the law is always playing catch-up with what tech companies can do. What feels like an invasion of privacy might be perfectly within the rules until a court or regulator says otherwise. For a deeper dive into how your content gets used, see our guide on AI content copyright and legal issues. **Related**: How do I opt out of AI training on social media? | What is 'data scraping' for AI and is it legal?