Add this to the ever-growing list of things we're glad we didn't have back when we were teenagers. GM this week announced the release of Family Link, the latest addition to its OnStar service. The new feature lets subscribers track the exact location of vehicles at any time via an online map. Subscribers can also set up a text message alert to keep on top of the car's location. There's certainly potential for the feature as a safety tool, but it's also no doubt a long awaited addition for overbearing parents everywhere. The service is beginning life as an invitation-only pilot program that includes around 10,000 OnStar subscribers.