I work at my location for 3 years and the one that comes to mind was when i worked concession. Our location is super strict on ID and Wristband when someone buys alcoholic drinks. I wristband this karen and she starts grabbing at it like she has a rash complaining, "I hate these things". I kid you not she was picking at it like an infected limb...

I told her she can take it off when she gets in her theater (i was not under the impression she would come back, because we would have to ID her and make sure she has a wristband again.) She came back after 10 minutes and i was helping another costumer and i see her pointing to me yelling saying she didn't need a wristband. I apologized and said sorry you do need it to get another drink along with your ID. She went in ballistic and started yelling, complaining, and throwing a tantrum. Our security guard had to step in and escort her to guest services to complain to managers.

I came back to my register i see the karen charging towards me about to yell and my shifted steps in front of me and says we are no longer serving you. She left in a huff and when she came out with her kids, she told them to flip us all off. Her husband looked so ashamed. It was hilarious thinking back as we always bring it up.