The latest update to HB has included meshes of all instances, so this may be a feature on the horizon. I'd love a bot that will farm instances, like outland ones that give rep that an 80 can solo. Inside an instance you can't be seen by other players, so likely you wont ever get reported.
Also, getting the bot to be able to run instances could make for a fast/safe way to level lowbies, just put in some logic to leave lowbie safely behind the main as it kills everything in its path. There are a lot of dungeons I use to boost my own (non bot) lowbies where the lowbies can stand at or near the entrance and still get exp. I sorta did this manually, running a different bot that supports instances on an 80, and manually followed with my 4 lowbies, collecting free exp and rep. Its probably too complicated, but wishful thinking never hurt anyone... Imagine 5 bots farming heroics all day long....