If one believes that no one is "all good" or "all bad", what do you think are the best points of the parents (Rex and Rosemary)? What are their worst points as parents?

As negative role models, the Walls parents successfully neglect their children, put them in dangerous situations, act irresponsibly, and even find it difficult to keep them fed.

On the positive side, Jeannette's parents encouraged individuality, independence and knowledge.