Wow...I guess I'll just apologize now for anyone who is so distracted by my wearing my crocs (the Rx style...ugly but keep me on my feet all day) and my blue jeans.....my T-shirt will likely have something Disney on it, so perhaps that will be less offensive to you?
Perhaps now that I know that I and my clothes will be so high on your list of sightseeing, I'll smile and wave as my kids (also in jeans and a T-shirt, unless they're in their Princess gowns or the handful of customs that I've made for them) and I are taken to our seat. I never realized that I was going to be the center of attention. It won't change my attire, as I wear my jeans and a shirt everywhere, including the dinner theatre we're going to tonight for my birthday. I spent too many years in high heels and pantyhose because it was required....I refuse to be that uncomfortable when I don't have to be. I also wear my jeans to church

but then hey, I figure that since He is watching all the time, he's seen me in my, ahem, birthday suit, and He still loves me, so I'm fine with it. Oh...and at my church....I'm what some of you would call an "elder" because I'm on the church's board of directors, I'm a lay reader (read from the Bible at the pulpit), a chalice bearer (give wine at communion) and I am occasionally a youth leader (used to be full time, but retired when I had my own kids, now I fill in or guest when asked). And yet, in all these years not once has anyone objected about my clothing....I'd hope that Disney wouldn't either.
If people want to dress up, more power to you...go for it....my girls are in the dress loving stage, and I'm fine with that so long they don't expect me to.....since tonight is my birthday, I'm gonna guess they'll be wearing a dress as it makes them feel more "celebratory". And that's fine if THEY want it. Me...I'm fine with them in their PJs, but they won't wear them outside the house, lol. To me, celebrating has to do with who's face I get to see across the table, and what they are saying, not with the shoes I can't see under the table or even the shirt I can see.
But...I gotta say that I personally can't recall what the people at the table next to us, whom we had a few moments of conversation with even, were wearing Saturday night. It was an expensive restaurant, well over $100 a person when you're done (without alcohol), but they were commenting on my beautiful girls (dressed in jeans and a sparkly velvety babydoll shirt)....so maybe their compliments made me miss if the woman had on heels? I'm sure they were dressed, because otherwise THAT I would have noticed, but I can't tell you if she had on a shirt, blouse or the latest rock band T. And I'm drawing a total blank on him at all, clothes, hair color, everything. And I can't even recall if the others at the tables around us were male or female (or both!).
I guess what I'm saying is that my enjoyment of my meal/event has to do with myself and my companions....not with others in the restaurant. In fact, on the rare occasion that I have noticed others in the restaurant it's usually because they are so different they stand out (must be the subconcious mind picking them up because I certainly am not looking around for it)....such as the person in extremely bright colors, or the adorable child, or the "too much skin showing for my taste"......and even then it's either pretty rare that it occurs (which I doubt) or more likely just pretty rare that I notice. And frankly....at WDW, I would think that those in heels and dresses would stand out more than others in jeans and crocs. But even when I've seen the "too much skin for my taste" folks, I simply look away back to my companions and get on with enjoying my meal. I figure if their mommas don't object, that's their problem, not mine!
So accept my apologies for distracting you....and get back to looking at your companions instead of me,

you'll be much happier!
All said very tongue in cheek of course...but the premise is the same....only YOU can allow someone else to ruin your experience in a restaurant.....unless they plop their jean clad behind on your lap of ourse, lol. I'd be more worried about the service and food disappointing after reading the mixed reviews about WDW restaurants than I would be about some jean clad customer at the next table over ruining my meal.