Why is surveillance good ?
Helps reduce the fear of crime.
People feel less of a fear of being a victim of crime when they are aware of CCTV and other surveillance systems, as they believe that there is a greater chance of the perpetrator being caught so they are less likely to commit crime.
Helps to fight against terrorism.
Using data mining and social media monitoring links are able to be made between disparate terrorist groups
Both for the prosecution and the defence.