EDIT: Please provide feedback on the Winter Bash over on Meta Stack Overflow:
If you participated in Arqade, you may have noticed the Holiday 2011 Hat Dash last year. It was an event where users could earn "hats" for their gravatars by completing various tasks. It's a somewhat specialized form of a badge in that triggering certain actions would unlock a hat.
Stack Exchange is running the promotion again, but this time extending the event to all sites. However, we as a site have to opt-in in order to participate. This is completely optional, and there is no obligation to partake in this event at all. If we do choose to participate individual users can choose to opt-out via an "I hate hats" option that will be available.
This is something that we can use to engage the community and also drive some activity. It's been too quiet here lately.
If you feel like this is a good idea, please voice your opinion. A response for the site will have to be in by November 28, 2012 if we want to participate. No response automatically means that we will opt-out of the event.