You and I have no idea how HN spam detection works - that's literally what you appear to be frustrated about. Maybe they detect that the person is visiting fro

You and I have no idea how HN spam detection works - that's literally what you appear to be frustrated about. Maybe they detect that the person is visiting from the same set of IPs and show the post even while logged out. (I strongly suspect that similar measures are in place to prevent bigco employees from mass upvoting their latest press release.) Maybe they use browser fingerprinting somehow. Ultimately it doesn't matter - dang et al. are going to do what seems to work for them to reduce their own workload and keep this place working as they want it to. If you don't like it there are many unmoderated forums to participate in.