When you're working in fast food, not a day goes by without some kind of customer shenanigans . You can head into work in the most peaceful mood, ready to do your best and provide quality customer service, and yet by the end of your shift, the customers will have sapped all of your patience. That's because a lot of fast food customers have the attitude that their order is the most important thing in the whole world. I know, they're hungry, but it's more than hunger: entitlement will have them g…