When my wife and I bought our house, I was delighted to see that it had old fixtures in the bathroom. I was recently showing the house off to a friend who is in construction, and he remarked that the slot in the back of my medicine cabinet is for DE blade disposal--just drop them into the wall! He's demo'd a lot of bathrooms with piles of old razor blades behind the walls from just such a slot. Pretty cool. Now that I'm getting into DE shaving I'm wondering, does anyone dispose of their blades behind the wall like this?