When a system is broken into by threat agents (e.g., hackers, identity thieves etc.) how much damage have then actually caused? Maybe none, maybe they are just using the existing resources to plan the next attack. Although few of us realise the amount of damage we receive when our private and hence personal information is obtained by these mischievous people.
Let us take a close look at a few breakings that have been catalogued here (i.e., http://www.privacyrights.org/ar/ChronDataBreaches.htm) and imagine that one of those breakings involved your private details.
This is a very good example of the magnitude of information lost when a breaking occurs, it can also be classified as an administrators nightmare.
Personally I do not see these types of attacks decreasing, on the contrary I see them increasing as motives (e.g., money) and finding targets is easy in our ever connecting world.
A Chronology of Data Breaches: Reported Since the ChoicePoint Incident – http://www.privacyrights.org/ar/ChronDataBreaches.htm