Can you provide a few examples of where this would actually make sense? I'm not coming up with any where the correct answer is "well if you named it and explained it better on the normal settings page then it wouldn't be so 'confusing', now would it?" :-)
For anyone who have been following development, there are so many times where the discussion goes like this: A: I need a new feature X to be added. Here is the patch. B: The option is fine, but we have to preserve existing behavior. A. Here is a revised patch with an option to turn it on. C. No. More options means confusion and clutter. -1. D. Let us have the option in $conf in settings.php where it is hidden. .... ad nauseum. So, this is my proposal: provide the option for those who want it and keep it out of site from the rest.
Personally I see "advanced" tabs and forms as a sign of failure on the part of the UI designer to properly organize and design the interface in the first place.
This is an example of how new features/options get shot down: clutter. It is sort of a Godwin law like thing on this list (just kidding, but there are similarities).