Look, I'm not going to waste my time trying to convince you of anything as you've established yourself as quite the Ferrous Cranius:
http://redwing.hutman.net/~mreed/warriorshtm/ferouscranus.htm
The only reason I reply at all is for the edification of everyone else on the list and anyone googling the archives, to put forth an argument that I feel has not been given the forceful representation it deserves. With that in mind:
I am referring specifically to this section of the guidelines exception that is the subject of this very thread:
http://fedoraproject.org/wiki/Packaging/JPackagePolicy#head-cc6af1b19379d1c8881c8636dc085e3bb8c6253f
This section, and really the entire exception as a whole is a weaselly way of granting JPackage a blessing to duplicate packages available in Fedora without stating it in explicit terms, which appears to have successfully slipped it past us all.
This is brain damaged beyond belief. Kill the exception, kill it dead. We never should have allowed it.
No, we can't force external repos to do anything. But we can refuse to participate in a process we know is broken and unmaintainable, and explain to external repos as to why this is so.
When a package moves to Fedora, external repos should drop the package from their Fedora repos. Anyone concerned with the package's maintanence in Fedora should become a Fedora maintainer, or maintain an amicable relationship with the Fedora mainainer. Yes, external repos often support other distros than Fedora. They can handle that however they like. Its not our problem. We have EPEL. The repo can port the Fedora package to whatever other distros they want. Whatever. Its Not Our Problem.
Fedora does not compromise its engineering integrity.
(And before I get accused of not participating in the drafting process: I was a lot dumber a year ago.)