AdvertisementOh, The Places You'll Go: Toilet Signs Try To HelpNovember 18, 2018Melody SchreiberfacebookEmailExperts agree that the image on the left urges toilet users to flush toilet paper in the bowl rather than toss it in a trash can. As for the image on the right, it appears to offer a double warning: Don't stand on the seat, don't relieve yourself in the upper tank. (Jennifer Wood/Courtesy of Doug Lansky)