How Facebook, Google, and Twitter train and use AI to manage abuse on a massive scale with some human help as false positives remain a challenge for AI (Alfred Ng/CNET)

Alfred Ng / CNET:
How Facebook, Google, and Twitter train and use AI to manage abuse on a massive scale with some human help as false positives remain a challenge for AI  —  From stamping out trolls to removing fake bot accounts, here’s how social networks are waging war using AI weapons.