I used to work in a service station when I was in high school. Part of the job was to clean the toilets several times per shift. I have experienced this horror first hand.... a silhouette of the toilet seat painted in light brown sprayed shit on the back wall of the cubicle. Of course, this was in the women's toilets. The women were always significantly more disgusting than the men. In the men's toilets, there would be the occasional miss and sometimes a cigarette butt, but I only ever found shit on the floor/walls in the women's.