Millions of waiters and service workers rely on tips to pay their bills, and you best believe they always remember their worst tippers. Diners who tip poorly, if at all, rank among the most terrible customers restaurant staff ever deal with, largely because they're able to get away with it.
Since tips are not legally required, cheap customers often assume they're unimportant. But when they make $2.30-an-hour, a service worker might put up with all your annoying customer habits with a big, fake smile, all in the hopes you remember to get the decimals right when calculating that tip.
Able to vent on Reddit, service workers shared their worst tipping stories for fellow waitstaff and service workers to commiserate over. Anyone living in the States understands that customers who leave no tips deserve a tip of their own: don't eat out.