I suspect that charm school is one of the last things on these individuals' minds.
Some of the sequences look staged - such as the one with what looks like a hand-held cam. Another one, it's obvious that the monitor is not hooked up to the computer. Another one, why no sparks, explosions, flying glass, when the guy puts a sledgehammer to his monitor/cpu?
On the other hand, the reaction of the other office dwellers to some of the antics makes me think that these sequences were not staged - they show real surprise.
I did computer field work in the early 90's, and never saw anybody destroy a computer. On the other hand, when I landed an in-house office gig for a big corporation, I heard that my boss in a prior life had taken an axe to a wiring closet, LOL.
The real issue on the service side of the fence is the endless number of ways that software and hardware (esp Microsoft/PC) can interact adversely, compounded by the end user who assumes (wrongly, in most cases) that the computer should be able to load and run any and all programs with no compatibility issues. And then there is the classic "it never did that before you came in and worked on it" complaint.