“What are you looking at, smoothskin?”

I forget where I heard the idea from, but I remember someone coming up with a similar idea, just way more sinister. Basically you get a bunch of these really cheap, battery operated speakers like they mention in the comic, but you put sounds on them like creepy children laughing or ghostly noises that are juuuuust loud enough to hear. Set them to have very long timers at random intervals, and scatter them inside someone’s air vents