waton, thanks for clarifying your words. By sticking out the tongue I didn't know you meant it making the cheek bulge. I tend to interpret expressions literally thus I thought you meant making the tongue stick out to the outside of the mouth, such as when 'making a face' at someone. I also now see that you might also mean that one could stick out their tongue (to the outside of the mouth) towards someone and not cause offense since the mask would be hiding the tongue.
I understood the other portion of your post where you said "right" to mean that masks are beneficial. Now I also understand what you meant by "and you can have a beard". Namely, that you can get away with wearing a beard (at least certain kinds) at the Kingdom Hall since the mask would be hiding the beard (at least certain kinds).