Technical means of obtaining private information of others can be abused. Here are some common methods: 1. **Social engineering**: obtaining private information of the target through psychological manipulation, deception and other means, such as by impersonating a trusted person to make phone or email contacts. 2. **Phishing**: using fake emails or websites to trick users into providing sensitive information, such as account numbers, passwords and bank card information. 3. **Web crawlers**: using programs to automatically crawl public Internet information, which may be used to collect large amounts of personal data. 4. **Network monitoring**: obtaining unauthorized information by monitoring network traffic (such as Wi-Fi networks), especially on unsecured public networks. 5. **Data leakage**: hackers attack companies or platforms to obtain and sell user information stored in databases. 6. **Malware**: invading target devices through malware such as viruses and Trojans to steal personal information and sensitive data. 7. **Social media reconnaissance**: obtaining information about an individual's life through social networking platforms to infer more private details. 8. **Human flesh search**: using the power of Internet groups to find and reveal a person's private information. 9. **Public Records and Database Search**: Using legal means to search for publicly available personal information, such as property records, court records, etc., for improper use. These methods may lead to privacy violations and information leaks under improper circumstances, so you should always follow ethical and legal standards when using technology and online resources.