I’d imagine it’s just one of those things where the safety feature for the murder box is just properly labeling the murder box, and making sure people who go in it are covered in ropes and safety equipment to pull them out if it starts murdering them.
Like people who have to go work in confined spaces like sewer tunnels. You can’t really put safety gear into the tunnel, so you have to just make it hard to get there, label it, and make it possible to quickly get people out when it goes wrong.