We talk a lot about the Facebook algorithm and the Chinese ownership of TikTok and the hostility of Twitter and the fomo and body image issues on Instagram. But if you’re looking for the social media element doing the most damage to your kids, it’s Snap’s streaks. They’re designed to create device addiction and as anyone with kids can tell you, they work. Soon, they’ll work with bigger devices! Snapchat brings chatting and video calling to the web.