It is their security blanket. Most likely they are all triple vaxed. A friend and I went to a Thai restaurant the other day. It was very quiet-more people still doing take out then dine in. Out of the 5 customers dining in, 2 were masked (one was sitting by himself, 6 feet from us and still masked until the unmasked waitress left his dinner!). Some people will never give it up. Maybe they will even demand burial with it on!