I don't think most modelers are hoarders as defined on the A&E program of the same name, i.e., people who hang onto things that are of little to no value, even though they may be unsanitary. There's a vast gulf of difference between having a large model car collection and, like one woman on the show, having two years' worth of used adult diapers piled up in your house, or, like another woman, a refrigerator filled with expired, rotting food because you just can't bear to throw anything away.
As the show has also illustrated, one of the reasons true hoarders have difficulty getting rid of things is that they develop emotional attachments to them. Speaking for myself only, that's not the case with me any my models. I'm pretty mercenary and will gladly flip a few kits on eBay or at a swap meet for some quick cash!
You are absolutely right Ken! I have seen this first hand having a sister that is a hoarder! We have cleaned up her place 3 times and now have just given up as each time she filled the place up faster than the last time!
All her husband says is "well, it's her house".