Courts have to decide whether to defer to community norms when setting a standard of negligence or to set a legal standard independently from the community norm. A community of homeowners has norms for maintaining the safety of steps leading to the front porch of a house. Similarly, hospitals and private companies that collect blood have norms for storing it safely. Make arguments for why a court might appropriately show more deference to community standards for porch steps than to a community standard for storing blood.