Let a circle owner delete other participants messages

What needs to be done?

Circles owner are able to throw a user away from their circle. But they should also be able to remove any message that a user has posted and that they consider it shouldn't be. For example a user that is disrespectful to other members or that write messages full of hate.

Technical details

It is possible to delete message on Prosody ? Or just edit the content and shows a "this message has been deleted" instead ? Today, I'm allowed to edit my own messages, but not delete them. I should be able to (add a Remove entry in the edit menu ?).