CCTV surveillance may be a crime prevention measure but it also costs a lot to buy and to maintain. It may seem a good choice in the long run.If one is installed along a corridor in an HDB flat, this could mean the invasion of the residents' privacy. The CCTV cameras will may instill fear into the robbers' hearts but into a resident's too. The robbers will be scared from robbing a house but it may too scare the residents there as they do not know when and where their actions are being noted down. This is a double-edged sword as it may uphold security, it could also mean that the residents will be controlled by the very law that protect them from these robbers. Although the action could be a very small one, a few of these could accumulate to become a lot and fines may have to be payed. The bottom line is that although this is the best way to deter criminals from comitting their crime but will invade the privacy of the civilians.