I like to think that creators who've had their TF2 Steam Workshop items accepted into the game were alerted to the fact by an ominous rumbling from their monitor. Without warning, the screen gaped open, and a shower of money fired out. Would you like your own money shower? You can have one - assuming you possess the raw talent to create spooky virtual headgear from nothing - because Valve are now accepting Workshop submissions for their annual Team Fortress 2 Halloween event.
Normally at this point, I'd quote a relevant section from the developers' announcement post. As it's TF2, that's not going to work, because said post is full of lines like: "That man was Bruce Willis in the haunted house classic Die Hard, and it should teach you a valuable lesson about showing a little advance respect for Halloween." There are tangents all up in that blog , is what I'm trying to say.
To pick out the relevant details, all submissions must be tagged Halloween 2013 in the Workshop. As with other Halloween items, they'll only be wearable during the event and on full moons. Because of that, creators have more leeway to stretch the game's usual tonal restrictions.
[Image Source: Dark Orchestra by Rain* ]