Lmao me and my economics teacher used the urinals next to each other and he asked me if I did my homework
"No... But I can make up for it ;)"
I typically avoid public toilets, except to pee at a urinal, or an emergency poo.
I never witnessed it, but at my old school, apparently someone used the boys toilet and then smeared their own stuff over all of the walls and floor, and then left it.
I don't know how you manage to do that without having stuff on your body/clothes and the stench of it around you.