These customers didn’t let their poor social skills keep them from dining at restaurants. Instead, they showed up ready to eat food and interact with wait staff as minimally as possible.
We all have days where we want to be left alone. Sometimes you just don’t feel like interacting with people, and instead, you just want to curl up on your couch, order food delivery, and watch a movie. It’s odd that apparently lots of people decide to go to restaurants when they’re feeling antisocial. Why would you go to a restaurant and then refuse to speak to a waiter? If you’re not up for chatting, there are plenty of other options in the world.
No, these folks are just entitled. They feel like they’re better than the wait staff, and decide to talk to them as little as humanly possible. Waiters who answered the question of the “worst thing to hear when you first walk up to a table” noted that some people don’t even let them get through an introduction. Instead, while the waiter is welcoming them to the establishment, they’ll just bark out the name of the drink they want.