The Halloween plot starts tomorrow, and will last for three weeks. Tomorrow morning, a handful of NPC poltergeists will show up on board. They will be player-controlled, so please feel free to have them run amuck with your character(s). They can steal items, move them, throw ink around, etc. Anything Peeves would/could do, these poltergeist can do.
They can be relatively playful, as in Peeves, or relatively scary, as in "Poltergeist". Whatever you like.
The only restriction (besides no killing/maiming/serious injury or serious damage to the ship itself without mod approval) is that you are only allowed to play with YOUR OWN CHARACTER. You can only have a poltergeist interact with your own character, unless you have pre-approval from the other character's player.
Have fun! Please don't hesitate to post questions/comments. :)