@fraying This comment from him is illustrative, I think. Specifically the idea that he is owed certain treatment
(I also agree that the larger servers certainly need better community management, and that admins should in most cases proactively provide reasoning where it would not be dangerous to do so)
@darius Yeah it's hard to see through all his bluster and ego, and I certainly wouldn't want him on my server, but he's at least raising a valid criticism. Not because he's special, but any member who has not obviously broken a rule is owed some notification about a permanent action like that.
At the very least, explain why the action was taken so people don't walk away with the wrong idea (like that posting to other services is breaking a rule).