@CoffinItUp Christianity, & religion in general, is all about "us vs. them," and thinking your superstition is better than everyone else's. Nationalism is the same dynamic. People want to feel superior when they've accomplished nothing other than being in their own particular circumstances.
@hwinkler4real Absolutely. It's not a full-service restaurant with waitstaff, and keeps employees away from their normal roles when they have to clean up after thoughtless Philistines. Have some class.