  Wikipedia guidelines regarding sources state that they are not strictly necessary when information is either plausible or uncontroversial.  The moderation policy at Hacker News is well known, well cited and has a huge impact upon those individuals who are not aware of the policy.  In addition, you can verify the instances by turning on the option 'Show Dead' in the Hacker News profile control panel to see how many users have been passively-aggressively banned with no notification.   Removing the moderation controversy additions favours Hacker News as a platform and can easily be misconstrued as partisan support or censoring evidence of wider criticism of the platform.