I remember in high school There was an ongoing conversation in a stall I took part in over the course of a few months. I realized eventually I was basically taking part in an incredibly slow version of a thread on /b/.
Most memorable graffiti in a stall in a girls' bathroom at my high school: "If everyone who writes graffiti about their sex lives or about other people's sex lives would get an education, the world would be a better place"Most memorable graffiti on a menstrual pad vending machine in a girls' bathroom at my high school: "Strong enough for a man, pH balanced for a woman"
I prefer the classic rhyme "Here I sit, broken hearted. Came to shit, but only farted."