If we can implant computer chips in cats and dogs, why not kids?

Yesterday, David and I were discussing the new plan for the downstairs bedrooms once we move upstairs. Paint, carpet, which room will be his office (Yay! We can have our dining room table back!) etc. Anna will move upstairs with us, into her own room, but we recognize that the day will come that she'll want more privacy and distance, and will want to move back downstairs. The room that makes the most sense for her to have (own bathroom) also has it's own door. To the outside. Which, we're thinking, might be attractive to a teenager. I (only half-jokingly) said, "Well, by then it will be legal to implant teenagers with GPS devices so we can track her location." David, always the sharp one, says, "No! Even better, in addition to a GPS tracker, the chip will also make her feel itchy and nauseous when she comes into contact with teenage boys!" Brilliant. I'm going to apply for a patent.