问HN：为什么有这么多无效评论？
我经常看到这里有些评论被版主标记为“已死亡”，这些评论往往很有见地，甚至非常出色。<p>这些评论并不是用户举报的，却被标记为死亡。我不相信用户是在恶意攻击，因为很多时候这些评论并没有问题。<p>那么，为什么会这样呢？是审查制度？还是宣传？<p>我有时会看到一个被标记为死亡的评论，随后又看到一个类似的评论被提升。<p>这似乎表明，HN对陌生人进行审查，而对他们的朋友则给予推广。
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I see comments here all the time marked as “Dead” by mods that are insightful often GREAT comments.<p>Not flagged by users but dead. I don’t believe users are piling on as there is nothing wrong with them half the time.<p>So why? Censorship? Propaganda?<p>I will sometimes see a Dead comment then another one similar to it that is promoted.<p>It seems like HN censors strangers and promotes their friends or something