First Idea: An item that you can place in the environment that looks like a bunny (maybe a 2D bunny cutout?) from a far or u can put it in the coaster so the killer might grab it instead of a player bunny.
Second Idea: A tool that will activate a striker or a door just to make the sound with no progress effect.
#Decoy item
abstract pivot
vague orbit
Oooooo, I really like the second one.