I debated this with my Mom last winter. It's cold in Chicago in the winter and she flat out refused to wear pants in FS. All she would repeat was "it would be a stain on Jehovah. I have to wear a skirt. It is not showing the proper respect."
I tried and tried to get her to see that it was simply a control issue; no, she wouldn't wear pants for anything.
When I saw this on the news, I immediately thought of my Mom.