First rant of 2019, but, I finally saw up close a fast food worker get hollered at by a customer. Customer is male, 50ish, and having a fit because he said they got his order wrong. Worker apologized and said the sandwich he wanted would be x amount extra since he was charged for a cheaper sandwich. He complained loudly that since it was their fault he should have gotten the sandwich for free. She explained again she'd have to charge the difference, and this is where he blew up and leaned far over the counter and pointed a finger in her face that he knew the owner and would make a personal complaint to him, etc. Then he stormed out keeping the food they'd given him.
At this point the worker went to the back and when she came up front a few minutes later I heard the shift lead tell her that she handled that very well (meaning she tolerated having this clown go nuts on her).

Another data point: it was during a very busy lunch rush, but all of the counter staff I saw were very polite and most importantly, were reading back the orders to each person. So it's possible the order was given wrong, the order was misunderstood, or the workers mixed it up.

Despite that, my rant is: When did it become okay to go berserk over a sandwich mistake??

I've been reading online about how fast food workers say that baby boomers are the ones most likely to do this. I've never personally done anything like this, but I'm ashamed for being in that cohort that is likely to have these blow-ups. No wonder no one wants to be a service worker if this is just a typical day at a minimum wage job.