As a matter of fact, there are a significant number of monitoring systems in public areas which were installed in cities. It is held that the camera systems were placed there only for safety reasons, in order to reduce the quantity of crimes. Nonetheless, there is a diametrically opposite opinion that such actions interfere with our privacy. This essay agrees that such a system is necessary to prevent crimes, since the more cameras are in the city, the less criminals and outlaws are likely to commit crimes and it makes crime investigation easier.