25 years ago I worked the registers at Target. One day at the back end of a pre-christmas lunchtime rush, this woman snidely remarks that I should be scanning faster. I bluntly told her that if she wasn’t happy she could simply shop elsewhere. Shocked she threatened to complain to my manager, I simply pointed to thr front dedk and said “go ahead”.

I still have my written warning in a box somewhere. Completely worth it lol