My coworkers and I were sitting around the table in our breakroom, all in little pockets of conversation, when off to my right, I heard my 24-year-old colleague say, "That girl was a red light friend." Um, please pause, person I'm currently talking to. I shifted in my chair. "A what? What's a red light friend?" Taylor proceeded to explain the clever system her parents devised when she was growing up. She said it helped her and her brother decide which kids they should be spending more or less time with. I was enthralled and inspired as she described red light, yellow light, and green light friends. What do you do when your child has a bad friend or one you're not crazy about? The friends your kids choose can have a huge impact on their futures, so I'm stealing Taylor's parents' idea, and you can, too. Here's how the system works. Here's the gis...