Companies building AI-powered tech are using your posts. Here’s how to opt out

Even if you haven't knowingly opted in, companies are still scraping your personal information to train their systems

Welcome to Opt Out, a semi-regular column in which we help you navigate your online privacy and show you how to say no to surveillance. If you'd like to skip to a section about a particular site or social network, click the Jump to" menu at the top of this article.

The competition to make the latest, greatest, most advanced artificial intelligence thing has turned an already data-hungry tech industry ravenous. Companies looking to build out their AI-powered search engines, smart email composers or chatbots are scraping your posts and personal data and using them to train those systems, which need ever-increasing amounts of text and images.