I worked at Peet's Coffee and Tea in Sacramento covering a shift for someone. There was a new person at the store and it was pretty well known that only paying customers get to use the restrooms. Well, a homeless man came in and asked the new person if they could use the restroom. I was on my break at the time, sitting outside smoking some cigarettes and sipping on a con pana. I saw the homeless guy leave the restroom and had a feeling something shitty just happened. I needed to relieve myself, so I go into the bathroom and find poop. Smeared everywhere. This guy must have started pooping in the sink, moved mid poop over to the toilet paper dispenser, and then proceeded to take his feces and smear them on the wall.
Needless to say, I made the new person clean it up and reminded them to only give the restroom key to paying customers.