Although a different scenario than wungout's, I have considered raising the railing at the aft helm deck on my boat, for several reasons.
Currently the solid teak cap over SS stanchions, completely lining my boat's perimeter, is 24" from deck. This normally provides adequate safety when offshore, but this comfort level begins to diminish when on the low side while heeled over. I think it's at the correct height, aesthetically and functionally, but my wife wishes it was a few inches higher.
Her greatest concern is the rigidity of the railing. last year, she received a nasty hematoma after slamming her back against the teak rail, after being subjected to a huge ferry wake. A lifeline would have been more resilient.
The consideration shortly after this incident, was to extend 8"-12" SS stanchions above the teak cap, threaded with a tensioned SS lifeline. Thankfully, this silly idea has not been brought up again since.
True Blue . . .
sold the Nauticat