Neil J. Rubenking writes: “It’s easy to notice that you’re too loud on the phone in public, less easy to realize that your settings let any schmo read your social media posts. And yet, protecting your privacy on social media is important, in more ways than you may realize. Perhaps you already know this. Perhaps you keep your privacy settings tuned and never overshare on social media. How about your friends? If they’re careless about their own privacy, their heedlessness can slop over and affect you.”