There are many things that can definitely shift your demeanor out of high gear and into low gear when walking into a property for the first time. One of them is the unexpected experience of walking into a property and finding it an utter mess, possibly even despicable. And when asked something along the lines of, "What do you think?", about the only repsonse you can politely and quickly come up with is, "My, oh my, you have a big ....mess."
Yes, cable tv and shows like Horders are helping get the word out, but I surely don't think it is a loud enough siren for a lot of homeowners out there.
Besides, the sheer mess that the house is. There is the lack of respect it conveys to others when they actually see it. In many cases, there is no one invited over because it is so despicable, so there is little to no home-social interaction. When the clutter is so great, it detracts from one's mind's ability to be at peace and relax because there are so many distractions. Additionally, there is a lack of opportunity to enjooy the property for what it is, because it has been converted to a storage dump which far exceeds something simple like clutter.
Maybe property owners should have to participate in a '3 hour' prepare your home course before they can seek to sell or refinance. Nothing says I don't value this property like having it a 'mess' for others to see.