Well, it wouldn't be on your conscience unless you fitted it.
We all don't like hearing about people having an accident, even less so when there is a fatality.
But think of it this way...
Say sketch fits a full race cage, including full six-point harnesses.
Let's say he has an accident that knocks him out and it just so happens that the car catches fire.
A passer-by wanting to help the driver out the car opens the door to help.
Now how many non petrolheads or car enthusiasts would be able to undo a harness and get the body out of a fully caged car?
In this particular scenario, I'd prefer a show cage.
But all this is just theoretical nonsense and I remain with what I said before, if sketch likes it, then why not, it's his car after all.