I've been in hoarder house once. Found this in an old thread:
This house was being rented from a guy in my division on the ship. He was nice enough, but a bit hygienically challenged - perhaps that should have sent up a warning flare. But he invited me and a couple of other guys over one day and we went. Lived in a new house in a new neighborhood in Virginia Beach. Opened the door, and it was basically like that picture, everywhere, only worse. The shock of it was truly amazing. He had a trailer trash wife and a couple of nasty ass little kids, who apparently were on a mission to ruin the place. Not even the walls were spared. It was beyond vile. One of the other guys had to use the bathroom, and said the inside of the tub was black with grime. At one point he asked us if we wanted anything to eat, and I said "No, that's okay. I'll just grab something off the floor."
Obviously we didn't stay long, and never went back. I can't imagine what was going through his mind when he asked us over knowing the place looked like that.
Here's the photo I referred to:
