I tend to think many women no longer have any idea.
I'm almost positive I'm the only person, male or female, wearing one to work today.
It might go without saying, but...
The girdle I wore today was black, not white, like in the pictures. So I wore the stockings pictured below (yes, black). The goes without saying part? Without socks, naturally. Think anyone noticed? Like Anonymous said, if someone looked really close, they might see my sheer black "socks" for what they are, they might see the bump of the garter straps under my trousers, they might see the slight bulge from the soft bra cups.