How to allow any publisher to delete any item

I would like to ask if there is any way how to allow any publisher (not publish-only) to delete / purge any item. I understand that XEP-0060 specification (http://xmpp.org/extensions/xep-0060.html#affiliations) mentions it like “MAY allow”, but I think that it is valuable feature.

Thanks in advance,
Michal

The current implementation only allows the publisher or admin to delete an item.