Here is another example of using old doors to create a railing that keeps people from seeing into the bedrooms from down below. The open railing on the one side lets the light and feel of the open space greet one at the door. From above you can be in bed or standing getting dressed and no one could see you from below. This allows the air to flow through the house and cool it in the summer when the loft windows are open.
This method of building a raised panel privacy railing does not take a real professional carpenter and it only takes half a day. Cost is minimal for a set of used doors and the section of railing is small. The turned posts all match up and down which is harder to find, but still, it would not matter if they did not.