For those fortunate enough to have missed the actual garbage, I would guess the perpetrator suffered some significant degree of psychologic trauma during the toilette-training years and is yet far, far from recovery.
Well, our fellow is hostile and isolated, which some of us can fathom.
If he's reading this, I hope he'll check in at - well, I dunno, me, I'd look to a university clinic.
Others may have other advice.
Don't mean this as mocking, but as help.
osso- I agree. His reaction to the perceived insult was WAY out of line, bordering on the pathological. I really wonder how this person thinks and behaves in real life.