She hasn't seemed swayed by the numerous objections that her suggestion is classist and retrograde. She's even brought up (favorably) the fact that ladies used to wear gloves. I swear, her FB wall makes her sound like she's a bajillion years old and except for becoming a lesbian, never changed any of her attitudes.
Air travel enthusiasts can be very, very weird about stuff like this, especially the ones who worry about having cough status with their airline of choice
Gods can you imagine the backup when Miss Fifties shows up to the airport in her hat, gloves and girdle? I would also note that during that period planes were vastly roomier than they are today and also featured smoke filled air for sharing by everyone. Well, everyone white of course.
It also demonstrates a huge amount of cluelessness on what constitutes "business attire" in the multicultural world we all live in now. Unexamined privilege is as prevalent in science fiction as it is anywhere else - especially on Twitter.
In a way, I think I understand her point. There was a time, when a person was wearing their better clothing, they knew they should be on their best behavior. And that's what's missing from airline travel these days - people's best behavior.