It seems apps have to be built to recognize a fixed set of beacon IDs. Is it possible for apps to discover and monitor a dynamic set of beacons, including beacons intended for other purposes? I'd like to be able to tap into existing beacon networks for my own app's use, but that would require being able to detect their IDs, present them to the user in some meaningful way, and then have my app watch for them.
Another scenario where this particularly matters is allowing multiple devices (phones, tablets, PCs, watches) to "pair" and keep track of their proximity from each other.