Ya know, most people just up and go to Disney. They don't slog endlessly thru message boards or make the internet their life while planning a visit to a theme park.
Lets think about what "theme park" dress is. It's shorts and T-shirts, right? Well, isn't it? Folks that don't make the DIS their life don't know that this particular theme park has areas with different dress codes than ANY theme park they've ever been to in their life.
If someone shows up at a theme park in appropriate "theme park" apparel, should they be turned away from the list of dining spots that requires different dress? I think not.
Look, no matter what anyone thinks, these restaurants are by no means "fine dining" in the traditional sense of the word, (V & A excluded). They are the upper end of Disney Theme Park Dining.
Oh, and by the way, when I'm eating at any of these restaurants, I don't care or notice what anyone else is wearing. I haven't been in a situation yet at a Disney restaurant where I found a strangers clothes choices more interesting than the company I'm with.