Not a mistake in the traditional sense, but certainly could use some revision in hindsight.
Thanks for your feedback folks. In a lot of ways, we are on board here and agree we need to look at this another time. For now, we will remove those hats from the emporium and introduce 5 different weapon illusions in their place. This should happen in the coming hour or two.
Anyone who has purchased a hat will be in a unique position for a short time whilst we work to refund the purchase and remove the item ahead of reintroducing it/them in a future update at a revised cost.