It could be doable. But, it would be inconsistent in some cases and
also would be a major set back as things would have to be
restructured. For example, the reason there are so many overlapping
packages between RPMforge and Extras is that the goals have diverged.
RPMforge maintains specs in a way that will make them compatible with
a wide range of distros. Extras is more of a laser-beam,
forward-looking approach. There are groups of people who fall under
the banners of either side.
The fact of the matter is, is that the user *chose* to integrate the
third party repo into their system. The act of doing this should come
with responsibility. Protecting them will do nothing to help the
situation.