Oh, these things exist; but anyone who understands the possibility that their writing can be flawed and there are ways to make it better is not going to perprtrate them.  It's the bulletproof egos that Feel More Deeply Than Anyone Else and therefore don't have to bother with spelling or punctuation, let alone more sophisticated virtues like character or plot, that perpetrate the real monstrosities in this regard.

I'm lookin' good in my Splatter Con T!

Mister, Cursor's Fury, Elaine, Ebenezar, Thomas.

I also have a shirt that has "Remember the Seven Laws:" and then a listing of the laws. It came out neat also.

http://www.cafepress.com/lowbudgetmovie

If it works for you, fine.  There are people for whom writing down the Wrong Thing stops them ever being able to find the Right Thing.  Both valid ways to be writers, but it's a good idea to know which is true for you.

But there are times when a scene screams to be written, and I do it without having the preceding scenes written.