so as a quick test, a little searching in the persona theme source login, I found I could refine it to this.
Then I added a quick inline style command to hide it in those 6 returned locations.
Then there were two place in
/templates/partials/menu.tpl that referenced
/login. I did the same there.
Would this be simple enough for a theme setting? Obviously not as an inline style.. that was simply the easilet/quickest way to see if hiding those elements worked.
Rebuilt and gone.