I encourage you to file a comment suggesting this. It's actually not irrelevant. The FCC is free to decide that the label (which can include a QR code linking to more information) must include information about cameras and microphones and whether there is a software-tamper-proof way to tell whether they are on. Or the existence of a hardwired LED could even be a requirement to qualify for a label. Your experience with the OLPC project would really bolster the credibility of your comment as well, so don't forget to mention that.