SUNDERLAND is a fully-urbanized planet that is dominated by competing corporations.  Through some fluke of societal development, what they mostly compete at is the invention of increasingly vulgar devices.  Life on Sunderland revolves around its frequent holidays and their "pranking ceremonies".  Status is earned by personally humiliating one's neighbors, using novel equipment that supersedes any previously seen.  The corporations cleverly target their advertisements so that everyone somehow manages to purchase such pranking kits.