Festival hat tokens
So I discovered today that you can waste your festival hat tokens by double clicking to talk to the exchange NPCs. I was browsing their wares to see which hats I was missing. When I went to purchase the hats I wanted, I discovered my tokens had gone missing.
Checking my inventory revealed two hats which were already in my collection. I sent an email to support, but I'm expecting the typical automated, "we're sorry, but we cannot replace your items" response.
I cannot begin to describe the feeling of rage and frustration I feel -which could have been averted by simply not allowing purchase of items without first clicking the "exchange" button.