This story isn't so horrible - a freak went down; people, that's a good thing. The search is inevitable and should even be expected. Just as your head turns to see the gory accident on the side of the road (and your foot instinctively hits the brake at the same time), so does the technician who just wants to see what he can see on an idiots computer.
There's little that can be deemed illegal on a personal computer except for child porn. Anything else is up to interpretation by a jury in a court of law. So how would a technician know to find illegal stuff including music. Much of it is purchased legally anyway.
This thread should be dead - its a no-brainer. Keep a clean house or fix your own machine.