[jlgreco]

My guess, and I share your attitude towards surveillance, is that installing CCTV cameras increases crime in the same way that broadening the legal definition of rape "increases" the number of rapes.

That is to say, more things are counted than before. Although CCTV cameras may not help solve crimes (I don't know if they do or not), perhaps they make it easier to count crimes.

[sambeau]

Pretty much spot on.