I use floating objects a lot in order to avoid duplicated code. The example was just that (to keep it simple). I used scenery for debugging purposes. Now that I know about conspicuous, I would use that for the trees in a real game.
The problem surfaced with doors. I had implemented my own doors and they worked perfectly, except that I had to duplicate the door in each room. "There must be a better way" thinks I to myself. Then I discovered Adventuron's doors, but they are one-way doors and require duplication, but you can't access their booleans and you can't have multiple doors in the same room and you can't unlock a locked door other than with a key, so it's back to square one.