I've seen those tv shows about people who are compulsive hoarders.  Do you know much about that?
Yes, compulsive hoarding is when a person has a problem with obsessively acquiring and failing to discard objects that cover the living areas of their home
Some of those shows, I just cannot understand why people would live like that.  Is it considered a mental illness?
Compulsive hoarding
Compulsive hoarding, also known as hoarding disorder, is a behavioral pattern characterized by excessive acquisition of and an inability or unwillingness to discard large quantities of objects that cover the living areas of the home and cause significant distress or impairment. Compulsive hoarding behavior has been associated with health risks, impaired functioning, workplace impairment, economic burden, and adverse effects on friends and family members. When clinically significant enough to impair functioning, hoarding can prevent typical uses of space, enough so that it can limit activities such as
Compulsive decluttering
Compulsive decluttering is a pattern of behavior that is characterized by an excessive desire to discard objects in one's home and living areas. Other terms for such behavior includes obsessive compulsive spartanism. The homes of compulsive declutterers are often empty. It is the opposite of compulsive hoarding.
About.
Compulsive decluttering is a type of disorder that is classified within a broad name, obsessive compulsive disorder, or OCD. Compulsive decluttering is the act of throwing items, or clutter, away, or getting rid of them