I love how computers are portrayed on television and in films. They can do anything. I'm sure it's been a dissertation subject.
Some programs (NCIS, CSI etc) seem to solve crimes almost entirely by computer. I do sometimes wonder how much of it is taken as real by the viewer. That there are massive databases of information (social security, tax, driving licences, criminal records etc etc etc) is true, but the manner in which it is shown as all being linked and accessible via a single agency is another matter, and the speed with which it is all done! DNA matches in seconds!!