Late Fees
I used to work at a video store, and after a while I got pretty desensitized to people throwing little hissy fits about late fees. One day a gentleman tried to rent a movie and I had to let him know he had accumulated some late fees on his account.
Cue standard rant about having returned them on time, blah blah blah, “…and I’m just going to cut up my membership card when I get home!!”
I reached under the counter and grabbed a pair of scissors, held them out to him and said, “Well, you can do that here if you like.” He gave me a venomous look and left the store in a huff. And it felt so good.
Story credit: Reddit / shaggydogg