oooh, yes, I have also gone through security barefoot. What doesn't kill us makes us stronger? Blech.
I really need socks but love the no sock look. I haven't quite found an acceptable solution. I have thin oxford no-shows (come up higher on my foot so they don't fall off and wad up in a ball in my shoe) but they are black...and show. I have nude...that show. They show around the back of the heel. If they didn't, well, the heel would probably rub. I do love my allbird sneaks because they don't rub.