Valve are looking for community prop makers to furnish the shooter's October update. From the Team Fortress 2 blog:
Scariness doesn't just happen, people. It's serious business. That's why we're giving you until October 1st to fill the Steam Workshop with horrifying Halloween-themed cosmetic items. If you're not an item-making sort of person, you can still keep busy. Why not visit the workshop and rate other people's Halloween-themed items? Rating terrifying items will also help you build up your resistance to being scared before we unleash this year's Scream Fortress update.
Thanks to everyone who sent this link in. Now make us some hats.