Haven’t a clue but a neighbour in an apartment across form us was doing that for a while. We’d drive out of our driveway and there would be this mannequin head in the window. I think whomever it was must have moved away because I haven’t seen the head in a long while.
“So, if you’re so curious,why don’t you go knock on the door and ASK?”
Right. Because it’s totally normal to go and knock on the front door of someone you don’t know and ask, “Yo. What’s up with the weird decor around your house? I’m told that serial killers rarely slaughter people on their front lawn in broad daylight, so I just figured I’d check in. Howdy, stranger.”