Complete waste of money as someone is not doing their job
I used to run a council network and by proactive monitoring I knew what traffic was on it, solving problems before they arose. Naturally as a council with an error free network, money could be saved by getting rid of the overpaid(?) technical manager, although how replacing me with 3 people saved money I am not sure.
A couple of years later I was called back as an expert witness in a "porn viewing" case. Talk about a botch up. At least half the time pictures were being viewed, although this act was never actually proven, the accused was actually miles away. This little fact did not deter audit in the least! One other fact was that the screen faced out into the office and no passer by had ever witnessed any display. Needless to say the charge failed, however as mentioned above a simple network alarm and nip round would have solved the problem with no additional costs.
As with this lot, a decent bit of monitoring, a quick talking too and public knowledge (rumour) that someone would be checking PCs and laptops at some point in the near future would have been enough to have located the actual perpetrator and nipped the activity in the bud and when you do that it never blossoms.
in my following companies that was all I did and we never had a problem.
I did try out some expensive monitoring software but the alarm for eastern european housewives turned out to be a Peugeot car owners club home page with a picture of a Peugeot on it. Most disappointing for the hordes of us gathered round to see what tripped the alarm.
Still these people must be doing something right as they have jobs and I can't get one!