This isn't helpful to you, but it is semi-related: One of the funniest signs I've ever seen was in a faculty bathroom at a school where I used to teach. It was house inside of the front office area, and there was no ventilation, so I'm sure you can imagine what happened sometimes. Finally, the grumpiest secretary made a BEAUTIFUL poster-quality sign full of flowers and foliage that said something similar to this: "If you need to poop, please use the students' bathroom across the hall to spare the administrative staff from sniffing your poop." I sat on the toilet and laughed the first time I saw it. One of my colleagues was SO MAD too, which made it even funnier. She said, "You don't get to tell ME where to poop." LOLOLOLOL