Details of global surveillance revelations leaked by Edward Snowden call into question the ethics of government surveillance. The abuse of surveillance will lead to the loss of personal privacy, affect people's daily lives, and cause the government to lose credibility. However, the data and information collected by government surveillance also contributes greatly to the prevention of crime and terrorism. Data-driven research findings could improve public wealth and save more lives in the long term. One solution that could prevent abuse of the technique is to establish a third agency to oversee government behavior to avoid unnecessary disclosure of personal information. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an Original Essay Government surveillance without proper supervision and evaluation will reduce the rate of people's participation in discussing social issues without decreasing the crime rate as expected. Furthermore, it could even threaten the personal safety of every member of society. For example, to recognize and combat cyberbullying and cybercrime, the South Korean government published a Real Name System Law in 2008 with the intention of cracking down on rumors on the Internet and mobile phones. In 2008, however, malicious comments decreased by only 0.9 points and at the same time the average number of online forum participants dropped from 2585 to 737 depending on the IP address. This type of government surveillance has been shown not to protect people from crime and cyberbullying, but to reduce online engagement. Ultimately, the South Korean government determined that the real name system was unconstitutional and abandoned it in 2012. Additionally, in September 2018, the Cyberspace Administration of China (CAC) promulgated measures to make the creators of online chat groups such as QQ and WeChat responsible for information provided to other users. shared in the group. Just in the same month, Liu Pengfei, the creator of a WeChat group, was arrested for discussing political and social issues in the group. This policy of the Chinese government is offensive to freedom of expression and has made Chinese people reflect on the trustworthiness of their own government. In these matters, governments have adopted radical surveillance policies without sufficient evaluation and supervision, and not only has people's personal security not been improved by such policies, but also some innocent people have become victims of the policy and human rights have been harmed . This disadvantage should be considered and avoided when creating and implementing new surveillance systems and policies. However, with proper use, the surveillance technique could also be a powerful weapon against terrorism and crime. In 2017, the FBI successfully arrested a man planning a Christmas terrorist attack by detecting his pro-ISIS and pro-terrorism content posted on Facebook. And it's not just limited to comments and messages, search history is also useful for tracking down suspects. In 2008, a software engineer named Brad Cooper killed his wife. His wife was initially reported missing for two months until a random person discovered her body. Initially, there was no evidence to indicate who the killer was, but soon Cooper's search history on Google map showed that he had searched for and zoomed in on the specific location where his wife's body was discovered. This strong indicator helped the police to.