Oh, and that reminds me of another thing. Visits from guards. Every time a guard opens the cell door you can walk/hop out and try to escape at the risk of raising your security level if you're caught. That's where level layout RNG becomes important because if you're all bound up in everything you almost certainly will be caught unless you can get to a ghost or shrine or else lead enemies into a fight with someone other than you. This is one reason the faction prisons don't have as many guard visits. Stricter because of less chances to escape.