You've given a clear, easy to understand example of something, and you've told people that this something is a zero-knowledge proof. Anyone who doesn't know wh

You've given a clear, easy to understand example of something, and you've told people that this something is a zero-knowledge proof. Anyone who doesn't know what a zero-knowledge proof is will give you positive feedback, because they had an easy time understanding the example you presented. People who do know what a zero-knowledge proof is will correctly point out that the thing you described is not a zero-knowledge proof. I think this explains the gap you're seeing between the feedback here and the feedback in "less technical forums." It's difficult to come up with real-world examples of zero-knowledge proofs, but there are two good examples on Wikipedia and one here (the "Where's Waldo?" example).