1, disorderly management: there is no administrator in the language lab, and the management is chaotic, which leads anyone to enter the room at will and make inappropriate remarks.

2. Lack of rules: there are no clear rules and guidelines, resulting in users not knowing what to say and what not to say, thus causing destructive behavior.

3. User quality: Some users may lack quality, disrespect others, and even deliberately make trouble.

4. Malicious attacks: Some destructive behaviors may be organized and planned malicious attacks for commercial competition or other purposes.