A Realtor who refers to me regularly recently had a dryer catch fire during a pre-closing walk through...

Probably half the dryer vents I see are incorrect in some way. I write them up, but I also tell my client: "There are around 15,000 dryer fires a year. Many (some say most) fires result from lint build-ups. If lint builds up, and catches fire, the *best* you can hope for is that a properly constructed vent system will keep the fire from spreading. So the best way to protect your family from these fires is to keep them from starting in the first place. To do that, you need to remember to do some simple maintenance, starting with cleaning the lint filter after *every* use...

And the first first thing that comes to my mind when I read that story is....