Why don't we mandate Huxley's Soma for everyone so all anger is suppressed at all times? Really, this obsessive hunting for displays of anger and ruining people's lives over it and the Schadenfreude makes me wonder who the actual psychopaths are.
But psychopaths turn their emotions on and off. They would have a violent, unprovoked reaction if it fit some goal of theirs. Thats the opposite of someone who can’t contain a violent outburst. Just to go on a tangent.
The man ruined his own life by being an absolute maniac. He has nobody to blame but himself, and to make it out to be a witch hunt is at minimum obtuse and at worst acting as an apologist for dangerous behavior. If throwing a printer at someone who's pleasantly introducing themself seems reasonable to you, please, I beg of you, never work anywhere. It's for everyone else's safety.
However, I've seen many witch hunts that engage in libel, so the story might have been dramatized. How about:
Office worker X carried a printer when Y entered the office without knocking. X turned around, startled, and dropped the printer near Y's feet in surprise. X curses "Don't you ever effing sneak up on me like that".
I absolutely know psychopaths who'd turn that into a defamatory story, which is easy nowadays since everyone is searching for aggressions of all sorts.
We tried that with oxycontin and alprazolam, didn't work out so well in the end.