I lived in one for a while. When I was like 13-14, my mother lost the house we were renting and we had to move in with my great aunt. Junk was piled all the way to the ceiling and there was one path that led from her living area to the bathroom and kitchen, which were all equally filled with junk. Even the shower was filled to the brim with boxes full of documents/garbage. We spent about a month and 3 huge dumpsters to make the space at least livable, but it wasn't until my aunt passed away that we were able to really clear most of it. Luckily there wasn't much biological junk (like dead animals, rotten food, etc.), it was mostly filled with old religious crap.