In my interpretation it will encourage posting noise questions here. Is there some legitimate reason for putting this hat in Winter Bash?
As the Winterbash FAQ says, this is just for fun. This hat in particular I guess is to get some traffic to the Meta sites. But in case you don't like them:
I hate hats! How do I get rid of them?
At the bottom of every page, there is a button labeled, "I Hate Hats!" This will turn off all hat-related events on all sites for you. You won't see people wearing hats, you won't be alerted when you earn a hat, and you won't be seen wearing a hat by any other users.