I was watching a program on HGTV this morning in which a very old and outdated bathroom was being renovated. When they broke down one of the walls, they found a bunch of razor blades behind it. There had been a slit below the medicine cabinet specifically for that purpose. I mentioned it to my dad later in the day and he said that was once a very common method of disposing of used razor blades. I never heard of this before and it seems like a very odd thing to do. Is anyone else familiar with this practice?