Eighteen-year-old waitress Sadie Elledge was working the lunch shift at Jess’ Lunch, in Harrisonburg, Virginia when a couple, in lieu of a tip, left a message on their receipt that said, “We only tip citizens.” Sadie, whose father was born in Honduras and mother in Mexico, is, in fact, a U.S. citizen who grew up in Harrisonburg. “I’ve had people make comments like ‘Go make me a burrito,’ but that’s at school and I don’t pay attention,” said Sadie, adding that the insult wasn’t that big a deal to her. But when her grandfather, John Elledge, heard of the incident...