I can't help but get second hand embarrassment from people who get THIS upset over a piece of cloth.
I think one of the comments on this video summed this situation up pretty well:
"That 17-year-old girl had more maturity than that old woman had by far! It is sad that she hast to try to convince a 35-year-old woman to follow the policy of her store, that no doubt she did not even create and she’s just following the rules LOL… All that woman wanted was a fight!"
Well, she certainly got a fight. At this point, I'm going to assume someone is asking for trouble if they walk around without a mask.