An easier route to make an ideologically pure Linux distribution, suitable for endorsement by RMS and the FSF would be for the FSF, who already have machines and infrastructure, to set up a Debian mirror which only contains main and re-badge it as fsf-linux. There are quite a number of Debian based distributions which have been set up by individuals in their spare time so I suspect they have the manpower, especially since it can use all the Debian BTS, mailing lists etc.
By putting in a very small extra effort they could even copy selected items (GDFL docs) out of non-free into their own fsf-free section. I personally think that it is a mistake to try to cut users off from non-free software by external diktat and that Debian gets it right by offering the choice to not have it in your apt sources. In the long run free software should win on its technical merits. John