This comment [1] suggests that if you type your password HN will remove it automatically. It appears this is correct, because in some places this person's comment is "-- removed --" while in others it contains "(removed automatically)". How does this work? I'm assuming HN uses a hashed and salted password. Does this mean that HN compares every word you submit in a comment against your password to make sure you haven't typed it in your comment? It seems like that would be enormously computationally intensive. Or, is this just a silly joke comment? [1] https://news.ycombinator.com/reply?id=13066958&goto=item%3Fid%3D13065670%2313066958