That's true! But:

* several of these utility functions and classes are already documented, and have been for some time
* they exist, and are used in Django, so it's better to document them than not
* we shouldn't have mystery objects in our codebase
* documented things get noticed, and are more likely to be improved and made more robust

I've perhaps over-egged the warning, but I it can always be diluted in time. Better to be cautious at first.