The argument over tracking devices was a little bit odd last time I saw it. Not sure what was decided. Some argue that it is IC since thats what they would do however I think dev argument was that tracking devices would not function that way and therefore not acceptable to track.
You are entering the vicinity of an area adjacent to a location. The kind of place where there might be a monster, or some kind of weird mirror. These are just examples; it could also be something much better. Prepare to enter: The Scary Door.
Lilith is correct. When there is an item directly named such, like masks and weapons, you cannot create a custom item to replace an actual item. And you would still be breaking the current restriction on tracking.