we got these neoprene masks that have replaceable filters in them that makes it much easier to breathe.. I dunno if they'd incorporate something like that in them, as well.. but, probably more like you said - just creating a "barrier" between one player's mouth/nose and everyone else - kind of like the glass partitions they've installed at all the stores we go to now between the customers and cashiers...
Friendship is like peeing your pants.. Everybody can see it, but only you can feel the warmth..