In the mid 2000’s I was down in Mexico I had my flag on something, I was talking to a person selling hats on the street. We got chatting and he says he would give me a hat for $20 because I am Canadian, when I pulled out a piece of paper with the queen on it the saler said no no $20 US. When I heard that I put the queen away and went to another person selling hats.
I am guessing the person was used to US people putting on our flag to make them look good.
Fair point however I will counter with: do not be talking up Canada to a Canadian tourist, ask for a 20 and get grumpy when they pull out the head of the commonwealth rather then some dead white guy.