Thank you UVS for your post, and for standing up to any attempt by someone using PM for bullying!
Some people obviously become obsessed with expressing their point of view, without showing any respect towards others. Yesterday the 2nd party involved in open debate with him, alluded to receiving a profanity laced PM from him. Unfortunately he has crossed the line of common decency, and appropriate social behavior/interaction. I certainly hope that he recognizes this and extends apologies, as well as making serious efforts to repeat such behavior!

Enjoy your day my friend!