Stack Exchange is looking to have some fun for the holidays by giving people hats for various tasks around the site. These, unfortunately, aren't real hats, more like holiday badges that you can see on your gravatar. They hosted a holiday hat bash on the Gaming site last year, and have asked if other sites would like to opt-in or out of being included in the event this year. There's an option for individuals to opt out, so if you're Jeff Atwood and don't want a hat messing up your hair, there's no cause for alarm.
Is there anyone that objects to this event for DIY?
Here's a example user page with the hats: