There should be a hat rating where when you tap on a hat you are given an option to either thumbs it up, or thumbs it down. You would release a multitude of hats and if it gets a significant amount of dislikes, then it gets removed from the store. Not from the database, but just the store since someone who paid for the hat might like if when others did not. This way you'd have more room for hats people enjoy instead of finding out the day after you bought an iTunes card that the hat you really wanted to buy was replaced with some nasty looking pixelated mess.