From your link: "There is still much research to be done to determine the effectiveness of CCTV cameras on crime prevention before any conclusions can be drawn."
Sure, there is anecdotal evidence of usefulness. And there are some rate numbers that may be correlated with CCTV camera use.
None of that changes the fact that we have seen an ever-increasing amount of surveillance, on the part of government, directed at its citizens. At what point do you suggest that it stops?