If just the knowledge that he mentioned your name upsets you so much, maybe it is time to tell all of your friends, that you have NO INTEREST in hearing if he contacted them. it is not a topic you want to hear/discuss, if they want to report his violation of the PO let them.
If your good friend hadn't given you all of these details and his interpretation of the behavior (which is only hearsay, not fact), you would have no knowledge and no upset, *shock* or sadness.