I do take your point, kjc, but the fact is that the Ed can't permanently remove anyone, however annoying he/she may be. He can delete a user's posts, but within minutes that user can sign up again, and away they go. All they need is an email address, which is apparently very easy to create.
Whether that will change with the new AB (or indeed, if it can be changed) - who knows? It would be good if the Ed would clarify the expected changes with the new AB, wouldn't it!