Rod and John Miller both seem to see them as constraints on free markets, with the former approving and the latter annoyed. John O’Sullivan seems to regard them as part of the free market: a way in which a “community” can see its values realized, and individualism tamed, within the market. That seems right to me. And while I don’t know the details of the “FEMA trailer park” that Rod mentions, the acronym involved makes me doubt that it’s a purely free-market phenomenon.