I'm sitting here, watching the crash and burn of one such person right now. She's been living with family members for years, has contributed zero, zilch, nada to the household, alienated her hosts, and trashed the house to a point at which code enforcement says they all must leave. Her hosts are picking new dwellings and won't include her. She won't even try looking for work. She's in denial and just wants to sit around all day, every day smoking pot.