Did you get this idea from the 2004 Scav Hunt item #80: “Brain Farts: The Collected Works of the University of Chicago Bathroom Graffiti”?
I never did (or followed) Scav Hunt as an undergrad, and only heard about that item in a Chicago Weekly blog post about my graffiti project. For what it’s worth, none of the graffiti here is from the bathrooms, but anyone interested in UofC graffiti really should check out Michael “mitcho” Erlewine’s PDF of the Pierce team’s submission. The “grout work” is a classic.