Working at a drive-thru means dealing with the full range of human behavior. That means handling customers who are everything from impatient to entitled to unkind. Every so often, you'll get a generous customer, but that's about as common as an eclipse, so you might as well figure out how to talk to these wretched individuals. Here, we have a new hire who was working her second shift ever when a group of entitled men were passing through and talking over one another while ordering. Naturally, t…