The following bad means may be used in forums to organize collective actions to suppress a user's reputation: 1. **Incitement**: Take the lead in making offensive and defamatory remarks, guide other users to follow suit and verbally attack the target user, distort the facts, and spread rumors and slander. 2. **Creating topics**: Deliberately launch negative topics targeting the target user, attract a lot of attention and induce others to participate in the discussion, and constantly strengthen the negative impression. 3. **Clique formation**: Form small groups, connect in the forum, echo each other, and unify the caliber to besiege the target user. 4. **Manipulation of public opinion**: Through frequent top posts, brushing comments, etc., negative content about the target user occupies a popular and prominent position, covering up positive information. 5. **Malicious reporting**: Collectively make malicious reports to the forum management, trying to use management means to restrict the target user from speaking, banning the account, etc., in order to achieve the purpose of suppressing reputation. . It should be emphasized that these behaviors violate forum rules and ethical norms, and seriously undermine the fairness and harmony of the online communication environment. Formal forums should strengthen management, maintain good order, and prevent such bad behaviors from happening.