A slight bit of hyperbole. My turn to point out what should have been an obvious joke.

Some fork makers actually recommend a few mm of spacer above the stem to protect the open end of the steerer from being crushed by the stem clamp. I know you are aware of that. But I think it is generally agreed you don't want' much more than that sticking up in case of an accident. A "post" like that could do some nasty damage to the body. Sure it is probably a long, long shot, but you never know. Just having some fun with it.