I have a legendary prisoner who owing to his murdering tendencies needs to be kept in an isolated super max cell. In it, he has access to most things that he needs including a yard.
The theory is that he will only ever come into contact with armed guards as they are the only ones who can really put him down when he gets into a bit of a rampage.
Unfortunately unarmed guards like to hang around in his personal yard leading to situations such as this:
How can I stop my guards assembling in this yard? Happy to do this through effective in game zoning/deployment or through the use of mods/file editing.