The following descriptions are only used to objectively describe and discuss phenomena or cases, and do not constitute guidance or encouragement for any behavior. In fact, these practices often violate laws, regulations and business ethics, and both users and operators may suffer legal sanctions and reputation losses. In a highly competitive market environment, some companies may take the following unethical or even illegal means to weaken their competitors' market position on the Internet: 1. Distributed Denial of Service (DDoS) attack: Through large-scale traffic attacks, the opponent's website or server cannot operate normally, thereby interfering with its normal business. 2. Create and spread false information: Use online platforms, social media, forums or blogs to publish false negative news or rumors, discredit competitors' brands and images, and mislead consumers' judgment. 3. Manipulate online public opinion: Hire "water army" or use robot accounts to spread negative comments and information against competitors on the Internet in an organized manner to create a false public opinion environment. 4. Black hat search engine optimization (black hat SEO): Use illegal means to manipulate search engine results, such as a large number of low-quality link construction, content plagiarism, etc., to reduce the ranking of competitors' related pages, thereby reducing their online exposure. 5. False reviews and malicious negative reviews: Posting false negative reviews on major e-commerce platforms or review websites to lower the ratings of competitors' products or services, thereby affecting consumer trust. 6. Phishing or intrusion: Attempting to steal competitors' trade secrets, customer data or key information through phishing emails, fake websites, etc., in order to gain a commercial competitive advantage. 7. Infringement and malicious imitation: Fake websites or social media accounts with appearance, content, and logos similar to those of competitors may be set up to confuse consumers and mislead market judgment. It should be emphasized that the above behaviors are unethical and even illegal, and may face legal risks and strict market supervision in actual operations. Enterprises should abide by laws and regulations and focus on improving their own strength and market position through legal and fair competition.