> obsessive hunting for displays of anger and ruining people's lives over it

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.