Some entertain themselves by smearing feces on the walls. Why I don’t know, but I’ve had to clean up such a mess in the past, in college I was a pool manager and that included the bathrooms. I did bleach the whole room and hose it down. There’s a reason for those big floor drains set into the tile.
I’m aware of the floor drains’ purpose - and the artists who prefer to work in personal excrement need to be locked up, just like the trans-gender gang. In fact, I’ll bet there’s a significant crossover between those two mentally-ill groups.
Saw that and a lot worse - full serve gas station in the 70’s.
Had to use the hose more than once....... But only in the women’s.