1. Make students with poor self-control ability indulge in the internet and spend a lot of time surfing the internet, thus affecting their academic performance.

2. The network is both good and bad, and it is easy to contact bad web pages, such as pornography and violence. Moreover, because middle school students are often easily influenced, have poor self-control ability and weak discrimination ability, they often embark on the road of crime because of bad content on the Internet.

3. surfing the internet for a long time is easy to cause hypoxia in the brain, which leads to listlessness and long-term tension in the eyes, which is easy to cause myopia.

4. Some students who surf the Internet for a long time are prone to autism, and indulge in fantasy all day long and get divorced from reality. However, when he really faces the society and people, he will shrink back because of the problems of imagination and distance, and dare not communicate with others normally.

5. Many middle school students blur the difference between real people and game objects by playing some violent games, and often treat people around them unconsciously by The Imitation Game.

6. surfing the internet for a long time requires a lot of money. when there is no money, people with weak self-control will take illegal measures to get money by hook or by crook and embark on the road of crime.

7. Internet cafes are often hiding places for unemployed people, drug addicts and criminals. Staying in these places for too long will often lead to accidents or be tempted.

8. Children's discrimination ability is not strong, and it is easy to go astray or accept bad thoughts.

9 is not good for the development of eyes and body.

11. Virtual worlds are very attractive, even adults are hard to escape, let alone children.

11 before accepting the standardized education and theory, accepting the network theory is easy to produce serious rebellious psychology.

Disadvantages:

12. Poor rest;

13. Poor spirits (mainly the first reason);

14, skin deterioration, pimples and spots (for various reasons);

15, affecting family harmony; (for some people)

16, affecting learning;

17, affect the work;

18, alienate the feelings with family;

19 waste time;

21, affect the mood, bad mood, but also tears, sometimes it is a very hurt feeling;

21, affecting eating (take care of surfing the Internet and grab a few mouthfuls casually; Or in a bad mood, can't eat);

22, regret in the world, good guilt (serious mental loss);

23, affecting health (the result of the comprehensive action of the above factors);

24. Destroy the personal principle: the principle of no contact offline will be invalid in front of very few people;

25. Waste of money: Power consumption costs money, and the contribution made by offline contact to China Telecom is overwhelming (so far, this expense for netizens is more than 1,111 yuan).

26. It poses a potential threat to the formation of young people's outlook on life, values and world outlook. The Internet is an endless "net" with rich but complicated contents. Teenagers frequently come into contact with the propaganda and cultural ideas of western countries on the Internet, which makes the traditional cultural concepts of China precipitated in their minds conflict with the mainstream ideology of our country, and makes teenagers' values tilt and even blindly follow the West. In the long run, it will exert a subtle influence on the outlook on life and ideology of Chinese teenagers, and it is obviously a huge potential threat to the political stability of the country.

27. The Internet has made many teenagers indulge in the online virtual world, divorced from reality, and also made some teenagers neglect their studies. Different from the real social life, teenagers face a virtual world online, which not only meets the needs of teenagers to possess all kinds of information as soon as possible, but also leaves a broad imagination space for interpersonal communication, and does not have to bear the pressure and responsibility in real life. These characteristics of the virtual world make many teenagers prefer to indulge in the illusory environment all day rather than face the real life. However, unlimited surfing on the Internet will have a great impact on daily study and life, and even neglect studies seriously.

28. Bad information and cyber crimes on the Internet pose harm and threat to teenagers' physical and mental health and safety. At present, the harm of the internet to teenagers is mainly concentrated in two points. First, some people commit crimes such as fraud or sexual assault; On the other hand, it is the harm of yellow garbage to teenagers. According to the investigation of relevant experts, 47% of non-academic information on the Internet is related to pornography, and the Internet makes pornographic content easier to spread. According to incomplete statistics, although 61% of teenagers inadvertently come into contact with pornographic information on the Internet, teenagers with weak self-control often look for similar information further out of curiosity or impulse, thus falling into it. The survey also shows that more than 91% of teenagers who have been exposed to pornographic content on the Internet have sexual crimes or motives.

29. Students with poor self-control ability are addicted to the Internet and spend a lot of time surfing the Internet, thus affecting their academic performance.

31. The network is both good and bad, and it is easy to contact bad web pages, such as pornography and violence. Moreover, because middle school students are often easily influenced, have poor self-control ability and weak discrimination ability, they often embark on the road of crime because of bad content on the Internet.

31. surfing the internet for a long time can easily lead to hypoxia in the brain, which can lead to listlessness and long-term tension in the eyes, which can easily lead to myopia.