Gosh Merlot how do you know people copy PM their supporters? I would never have thought of that.
I think it was MissA who said post the PM and don't name the sender, I agree for two reasons: 1, you will soon find out if others agree it is unpleasant and 2, they will see the reaction of other Gns.
I had a couple of pretty nasty messages some years back from someone no longer here. When I replied, perhaps a bit hastily, she reported me and hers was much worse than mine! Apart from that the only PM which was not lovely was from a Gn who was very patronising, I think she has left.
I think most PMs are from people who want to be helpful.