I kindly explained to a customer that they couldn't block a fire exit and was written up for “talking back” to a customer. I was told in the meeting that it's okay to let these things slide and I'd be punished if I didn't immediately do what the customer requested. It's my first write up in ten years and I recorded the whole meeting my boss had with me about it. (It's legal to do so here) How illegal is what I've been told and how can I go about getting my work to follow these safety guidelines in the future?
I live in Canada.