I don't think a dress code is necessary. Just use common sense and consideration.
And that remark "I don't want refugees from Wal-Mart" What an insulting remark! I shop at Wal-Mart and Target so I guess I"m a refugee too.
I would never go bare feet on ANY flight. If I am in the air an extented period of time (5 hours or more) I will takes shoes off (to prevent swelled legs and feet) I carry those United grey socks and wear them everywhere (and yes they are washed with Tide and dried with Bounce Dryer sheets.) I keep my slip on shoes/boat shoes right nearby in case I need to leave right away.
If I sit next to a woman I keep me shoes ON ANYWAYS because I feel it's not classy to go running around on stocking feet in front of a lady.
I never go barefoot. It's unsanity and who knows what disease you can pick up even on the rugs.
As for dress.
Business: polo shirt and slacks... or suit if meeting is in short time from plane's arrival.
Pleasure: I try to go dressy causual. Sometimes I wear neatly pressed dress shorts and polo shirt.
I will wear my Jimmy Buffett Parrot Hat or my Red Green fisherman's cap when I'm giong to thos efun events. Like KOKO wears his Goofy hat to Disneyworld (I never had a Goofy hat!

)
For Hawaii and on my birthday: my "Paradise on a Hanger" cat design Hawaiian shirt from Wanderlust." If I get the dress police after me I will top it with my Brooks Bros navy blue blazer.
PremEx is right: If I see people barefoot and in too short shorts or messy t-shirts in first I feel uncomfortable. I even would feel uncomfortable with Jennifer lopez pouring out of some skimpy thong like barely clothing.
Basically for dressing: use common sense and be considerate of your fellow passengers.
I'd like to work in my boxer shorts on my job. I do at home. BUT I can't.
[This message has been edited by Catman (edited 08-18-2000).]