I know what you mean...I get looks and questions all the time...
...and how foolish for people to mock what they don't understand...I LOVE my water shoes. They're ugly (kinda like platypus feet), but I don't have sore, scraped up feet after a day at the water park.
I also see people snickering over my Mickey shirts & Crocs (which I admittedly wear in my "regular" life away from the parks). I see idiots wearing heeled sandals and sundresses in the parks, but do I make snide comments? Heck, no! To each his/her own!
I say, "Water-shoe-wearing, fanny-pack-sporting, Croc-loving, Disney lovers UNITE!"