So, kinda in the same vein as the OP's story...
My mom has/had a specific detergent she uses/used for white clothes as it had a bleach alternative. She got tired of us using it for regular loads since it was color safe and it was expensive, so she wrote in big bold letters on it "FOR WHITES ONLY." Fast forward a little bit, and my older sister is bringing her boyfriend, who happened to be black, home for the first time. A few minutes before they get there, my mom happens to look at the detergent bottle and goes, "OH NO!" She runs and gets a marker, scribbles out the s in whites and fanangles "clothes" in there somehow. She ended up telling my sister and her boyfriend at some point down the line and he thought it was hilarious.