The page owner(s) should be able to control permissions for pages: ideally for reading and separately for creating / editing.

Essential for any restricted or non-public use, and to control editing rights. Without access control, any page is open to abuse. Lack of boundaries here also violates one of Ostrom’s principles.

Should be fairly obvious for anyone who has implemented this kind of thing (not me).

And – maybe should be a separate point – maybe little or no harm.

• Fedwiki takes the radical approach of having pages owned by just one person, so there is never any question of access control.
• DokuWiki and other wiki systems have various levels of access control.
• MediaWiki is designed for open access, and has only limited controls.
• Google Docs/Drive has quite a complex permissions system, perhaps more complex than necessary.