I've toyed with implementing this also, and I have had a couple of thoughts on it.
- Should I trigger the effect, even if the player has not had the item identified, resulting in "instantly destroying both items and opening a gate to the Astral Plane." - with no apparent explanation to the player.
- "If the bag is overloaded, it is destroyed, and its contents are scattered in the Astral Plane" - does this just update the items location in the players inventory to "Astral Plane" or have them deleted from the players inventory, with maybe a chat log of the items that were scattered.