If nothing else, it's simply being polite to the people around you.wasn't actually a Hippie, But, in my early LEO days I did pose as one to infiltrate the druggies for a bust.
BUT, I do wear a damn mask, cause its the prudent thing to do, not cause Big Bro said to, he can get screwed, but me, I buy insurance, HD weapons, TP, and wear my damn mask.