If you are going to pretend that you don't understand his point, then I'm going to pretend the same.
It was obvious that he was unhappy about how your staff was treating him, and he expected you to do something about it. This has been obvious for a while.
You damn well can tell them to leave him alone at PN. Sure, you don't have to if you don't want to, but you damn well could.
You can say that it is not your place to do that, but if you do, then he has every right to give his opinion that you are not doing what you should.
He volunteered to help on the staff and when you were saying you wanted help. I did as well. You can blow me off and have a reason, even though it is true that I would do a better job of it than you do. But there was no good reason to reject him. The reason was the number of posts he had at the time, and I agree that that was a piss poor excuse, and the number of posts was not the point. The point was that you asked for volunteers and got them, then it became obvious that you did not want volunteers. I was insulted to be rejected, and I knew you were just blowing smoke. Jason had no way of knowing.
Personally, I think it would be great to have an Admin. that has a hand in working with VP, and more of an interest, but we are not even talking about the admin position but a moderator, which would really be a good position for someone with his talent.