Apparently Blizzard liked this bug, even if it wasn't really appropriate for player use. MMO-Champion datamined a new item called a Stackable Stag from the patch 5.1 PTR. Using the item will summon a stackable stag at a target location, and if there is another Stackable Stag present, it will stack on top of it. It's not quite as laughably horrifying as a giant stack of stags trundling through the streets of Orgrimmar, but I'll take it.
At the moment, it's unclear where one will be able to obtain this item, but it should clear up by the time patch 5.1 is released.
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