Against flip-flops: Put a shoe on, you slob. - Slate Magazine:
This person HATES flip flops.
(I remember when they were called thongs many moons ago.)
We’re talking about grown adults in affluent societies—people presumably in possession of at least one pair of actual shoes—who see fit to navigate the grimy sidewalks of large cities shod only in a loosely flapping, half-inch-thick slip of rubber. Those people—you, if you’re among them—need to face the reality that you are, in essence, going barefoot, and it’s grossing the rest of us out.
I have to admit I feel the same way about flip-flops ever since moving to SF - the sidewalk is basically a public toilet.