Unlike the military, covers are worn indoors, you can remove it if you're seated, same goes for your blazer, but if standing, you wear it.
Well there you go.........seems prettty simple when it put it that way. Anyone who makes fun of the person that is doing what is required is that same person who made fun of people in high school for no reason either. Some people just like to make others the butt of the joke.
USMCFLYR