We should have a standard reply for this. Preferably better than "hey dumbass," although that would work too. I wish the burrito Brothers were well known enough so we could just let out "flying burrito brothers" as a war cry and see the pansies scatter, but that's probably not yet enough fair warning.

But yeah, wearing a mask and crowding space is a net negative in terms of the spread of communicable disease. As if that were ever the concern.