You know, I'm not picking on the OP, but I see this complaint on the Dis regarding club level all the time and I just don't fully get it. While walking barefoot in a public space isn't something I'd do if I could avoid it (heck, I'm someone who avoids being barefoot on any hotel carpet, including in-room), I also rarely do footwear and clothing inspections of those around me, so couldn't even tell you if so-and-so was at the such-and-such wearing their swimsuit/tank top/mini skirt or sitting in a dining area with bare feet.
I'm frankly just baffled as to why what someone else wears, or doesn't, bothers so many, so much. Sure, if someone came to breakfast topless that might be hard to overlook but, heck, I've been on European beaches where topless is the norm and even teenage American boys quickly learn it's rarely titillating. Far more
National Geographic bodies on display than Playboy. To me it's just another in a long list of things I wouldn't do/wear/say myself, but find it, frankly, pointless to get overly bothered about someone else doing. (The old, you can't control someone else's actions, only your reaction adage.)
For those that say sanitation is their concern, you do realize that people are 10,000 times more likely to contaminate a food space with unwashed hands--something you can't know by looking--than bare feet, right? And that while I absolutely agree that wearing shoes in public is commensurate with manners to most Americans, soles of shoes, which are rarely washed, are FAR MORE likely to be "dirty" than someone's bare feet, which are cleaned each time they bathe. (You can actually eliminate a huge percentage of household dirt and germs, something like 80%, by simply not wearing shoes indoors ... Which I keep telling my husband, but he never listens to.)
It's also worth realizing that wearing shoes in a personal space is what would define you as uncouth, not the opposite, in many cultures. Do you think the Tokyo Disney hotel message boards are full of people outraged that "manner-less" Americans are wearing their dirty shoes in the semi-private club level eating space?
It's considered normal in many European and Asian cultures to treat a hotel, your defacto temporary residence, as you would your home. Go to Germany, any of the Scandinavian nations or Japan and you'll see plenty of people eating breakfast, in the hotel's public spaces, in robes and slippers, even when those same people wouldn't dream of leaving the hotel in their jammies.
Basically, what you have is a cultural perspective, not a health hazard.