A variety of U.S. airlines are going the full cattle car route, right? (see https://philip.greenspun.com/blog/2020/06/16/american-airlines-the-magic-of-air-travel-in-the-age-of-corona/ )
The theory is that the magic of masks will protect the 150 people on a 150-person Boeing or Airbus from giving each other the plague. (As a friend notes “If a bandana is effective PPE for Covid, then a saline injection is surely an effective vaccine.”)
Suppose that you’re on one of these Plague Special flights. The person sitting next to you is infected with coronavirus. You’re wearing a surgeon’s mask, which provides almost no protection for inhaling. Your infected neighbor removes his/her/zir/their bandana to drink some coffee or eat a sandwich. That’s not prohibited, right? Why don’t you get coronaplague during the 15 minutes that it takes your middle seat neighbor to eat/drink?
Suppose it is a six-hour coast-to-coast flight. Your exposure to your unmasked middle seat neighbor might be a full 30 minutes. Isn’t that long enough to transmit any virus?