Last year, we had the Winter Bash on Physics Stack Exchange.
For those who weren't around or don't remember, the event is one where completing various achievements on the site earns you different hats that can be "worn" on site; appearing on top of your gravatar wherever it is shown on the site. They're basically badges that you can wear.
We need to let the team know whether or not we want to participate as a site this year. So, what say?
Note that individuals can opt out if they wish.
Update: Given the response, I've submitted the form for enabling it on our site. Those who didn't want hats, let us know if you are having trouble disabling it (note: it's only going to be around for the last week of December). Those who want hats, here's something to satiate your hunger for hats until the Winter Bash: