有部分人是concern troll，解释如下

来源: Truemoon 于 2017-12-27 17:04:13 [] [旧帖] [给我悄悄话] 阅读数 : (1857 bytes)
concern troll
In an argument (usually a political debate), a concern troll is someone who is on one side of the discussion, but pretends to be a supporter of the other side with "concerns". The idea behind this is that your opponents will take your arguments more seriously if they think you're an ally. Concern trolls who use fake identities are sometimes known as sockpuppets.
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