What I mean by this is that it would be nice to be able to distinguish whether an admin or mod is participating in a conversation as a regular user or in their official capacity. It looks like this sort of functionality is half-way there; I imagine this looking graphically something like the way “Topic Lock” messages or “This topic is now pinned” messages are displayed with a colored background when the mod or admin to denote that this is “Word From On High” as opposed to the opinion of a site user who happens to be a mod.
I imagine the UI for this might be some kind of megaphone button that would also tint the background of the post editor. (Or, using font-awesome, fa-bullhorn. Maybe fa-bell or fa-gavel.)