We are generally on the same page, and your thoughtful reply got my upvote. I bet we'd agree good UI derives from familiar concepts and offers affordance. You

We are generally on the same page, and your thoughtful reply got my upvote. I bet we'd agree good UI derives from familiar concepts and offers affordance. You don't need to be technical to have a decent idea of what "Unlisted" means. A pretty good analog are the days when White Pages had everyone's phone number printed in them. If you wrote your unlisted number on a billboard or gave it to someone else who compromised it, you wouldn't expect to retain your privacy. There are lots of things on the Internet that quack like a duck but bite like a snake; this isn't one of them. It does exactly what's written on tin. It's unfortunate (if not surprising) that malicious individuals are compiling the digital equivalent of "Dark Pages", and I salute your effort to raise awareness of that risk amongst web developers. I grant "Unfair" wasn't a precise enough word, I just felt at that point you slipped from spotlighting unintentional architectural oversights that are fair game, to advocating opinionated change to a deliberate design choice. Sometimes we need real scissors, not safety scissors!