Yup. I was once at a dry New Year's Eve party thrown by a family member who invited all their friends in recovery. I had, I think, something stuck in a tooth and looked in the medicine cabinet to see if there was any dental floss. It was completely empty save for a taped-up sign saying "ARE YOU KIDDING?"

Another time a more distant family member who was known to have trouble with prescription meds was in our house and spent a suspiciously long time in the bathroom with the water running. My husband whispered, "What is she doing?" and I whispered back, "Going through the medicine chest." -- "Is there anything in there?" -- "Maybe some expired ringworm ointment." We managed to stop laughing before she came out.