This gives me the urge to delve down into some forgotten places and become that mysterious asshole who masterminds little things to fuck with people.
It's a form of art, I find. I've done little things in forests and mountains to play with peoples minds in the past, and they can be fun little projects!
Definitely a good idea to avoid going through too many of those houses there, more dangerous than just about any cave, especially without anyone to watch your back.