There are several ways a subreddit can be manipulated. "Brigading" involves a coordinated attack by social media users on another group. In Reddit that would be a group of users looking to manipulate the conversation or voting pattern on a subreddit.
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，这一点在safew官方下载中也有详细论述
Трамп высказался о непростом решении по Ирану09:14
（四）围攻裁判员、运动员或者其他工作人员的；