I think for some it is a form of therapy to shop. I am not talking about the people that will not throw away a paper plate or a tin can, but other stuff, like clothes, shoes, toys, etc..... I think sometimes when a person is lonely or sad, shopping is entertainment, or a high. Then the more they do it the stuff collects. Like someone said above, I think there is a difference in being nasty and lazy and just hoarding things that are of some sort of value.