I'm pretty sure no one is going to be hunting down NDA infractions on HN unless the poster is silly enough to give specifics about the workplace and time at which they solved the problem. If it takes some kind of investigative work to piece together the most basic details, I think that's within the terms of most NDAs anyway.
One of the last times I commented in a thread like this, someone looked at my profile (which has my real name), found me on LinkedIn, and then posted my employer's name in a reply to me, calling out an alleged conflict of interest (you can find it in my comment history and make a decision on that for yourself, if you're curious).
It's not worth the internet points for any of us to post details beyond what we do.
