Brainstorming the Augmented Reality Create Message Use Case

I was wondering if it were possible to brainstorm the use case that
Christene presented earlier today.  Click on the pdf for full details.

Is there a standard ontology that can model this?  Maybe combine it with
linkedgeodata? (cc'd)

http://www.perey.com/ARStandards/AR_Create_Use_Case.pdf

User Story

User is walking down the road with an AR enabled device.  User wants to
leave a message to express themselves in some way.

Decide if public or private message.  Anonymous or signed.

Create the message and position it (or vice/versa)

Another person comes along and discovers and consumes the original message
in registration with the real world.  (Live AR View)