I worked in a customer facing role and a UPS driver regularly delivered to my counter. For years I had all the smile/cheer up shit.
One day I'd had enough and he said "smile for me"or "give me a smile" and I just said "no I don't want to smile for you" ...all of a sudden there a was s real atmosphere and his mask slipped. The other woman I worked with look visibly scared. He must have said something and left.
Having never felt entirely comfortable round this man, afterwards I was genuinely a bit scared. If I saw one of the brown vans, even if I was outside of work I'd be worried it was him.
It got back to my boss and her alongside other team members made me feel I'd done something really wrong....I was glad to leave the job tbh.