When leaving negative comments in the school's anonymous evaluation system, you should be objective, rational and respectful, and avoid malicious slander or false statements. However, it is not recommended to leave negative comments anonymously in an improper or unethical way, which may lead to a series of adverse consequences and is not conducive to the resolution of problems and the construction of a good teacher-student relationship and campus atmosphere. If there are indeed reasonable opinions or problems, you can actively communicate through appropriate channels to promote improvements, rather than simply relying on anonymous negative comments to solve them. If you must explore the way to leave comments from an anonymous perspective, under normal circumstances, in the evaluation system, in accordance with the system rules and prompts, truly express your feelings and ideas, and do not mention personal identity information, which is a way to achieve anonymity. Trying to be "anonymous" in an improper, loophole-taking or unethical way, such as using technical means to bypass the system security mechanism, impersonating others, etc., is not only a violation of rules and ethics, but may also bring trouble to yourself. It is recommended to communicate with teachers and relevant school departments with an open and constructive attitude to jointly seek the best way to improve education and teaching and solve problems.