The description for the hat, "011" is not that clear:
Collect 11 hats
Even I was confused with this. I realized that when it says collect 11 hats, it means collect 11 hats on a single site. For example, you must earn 11 hats in Stack Overflow. Its current description really says that all you need is 11 hats: regardless of which site you collected them from.
Can we change the description of the hat to:
Collect 11 hats in one site
in order to make the description clearer and less confusing?