I’m sure if they could kill global phone networks with FaceTime for everyone they would, but I think that they’re solving spam by blocking any device that spans

I’m sure if they could kill global phone networks with FaceTime for everyone they would, but I think that they’re solving spam by blocking any device that spans using a serial number or secure UUID or something that iOS can’t fake, rooted or unroofed — but their web solution can’t access such data to provide a hardware-baked identifier to ban for spamming.