I don't understand the widespread lack of scientific knowledge many customers have when they wear a mask: it's not covering their nose, a more likely source of virus spread than your mouth. 95% of my grocery store customer base in a single day are following the rule, scientific advice and state law in public places, we provide a free blue surgical mask to anyone who come in without one in a way to keep them in our store...but if they refuse and start a verbal match with me or the store staff, we'll have private security or law enforcement remove them. I have to say we have at least one Karen (female or male) daily pulling off the "masks are fascism", "you can't force me to conform" and "you're not the boss of me" remarks, except I often don't observe them on my shifts.