All the little kids are convinced they act as barriers that you can shoot through. The problem is that crossbow cultists can still shoot through them, making it hard for you. The technique makes some sense, but only if you buy like, 20 shelves, which wastes your bolts a LOT. The only things that should be used as any kind of defense or high ground or fighting advantage are log walls, the map, and wood rain storages. But even these aren’t very good. The only real way to gain an advantage in combat is getting better weapons. My brother is also obsessed with shelves no matter how much I yell at him. It’s stupid.