Based on some testing on MediaWiki.org, page protection and the abuse filter do not work - page protection does not change the ability of all non-blocked users to edit the page and abuse filter does not pick up any edits generated by the visual editor.
I believe that the underlying problem is that using the visual editor is not a named action that can be restricted or filtered at the moment. If it was, then it would be possible to assign it to $wgRestrictionTypes and it would be possible for the abuse filter to log it (though the abuse filter does need the addition of some variables or other modification to accept visual editor edits).
Version: unspecified
Severity: normal