Maybe this explanation will clarify:
Military UAS as well as any manned aircraft, fixed or rotary wing, that carries any sort of payload (cameras, SIGINT packages, weapons, ect.) is referred to as a "platform" The sole purpose of the aircraft is to deliver these payloads to the battlefield to accomplish whatever mission that they are designated to perform.
Thats all quadcopers are: camera platforms--for now. The serve a range of purposes; imagry/photography, first-person racing (some of the footage i've seen is actually pretty neat), and a few other uses.
This explanation doesn't change a whole lot, except to say that they aren't "models". This is why the Academy of MODEL Aeronautics can "support and educate" all they want but hopefully they are painting a picture with the FAA of "If they break the law, and are not with us, they're all yours"
This would benefit the AMA if all of this registration business takes place, as dumb and pointless as it would be. Either pay a bunch of money just to register EACH your quadcopters, or join the AMA and get a monthly magazine, some stickers, and all of your flying things are covered. Give everyone 2 strikes for violating an AMA/FAA safety regulation: a warning for the first, bar to renew membership after the second. Without AMA membership they should be subject to all of the fines that full-scale pilots are when violating the FAR/AIM.
Not a leakproof solution of course, but this is the best way that I can see that this all would work and not much change would be felt from the "traditional" modeling community.