It is overreaching. I have no problems with the FSF/GNU using such terminology, that's their perogative. I use it myself. But to require other parties to use their terminology is certainly overreaching.
I've read time and time again people (mainly RMS) harp on and on about this point to others, quite often to the detriment of the real subject of discussion. That is to say that by obsessing over this minor point of terminology the discussion was sidetracked into irrelevance, and the actual important discussion was forgotten. This does not help the FSF/GNU in any meaningful way. Forcing others to adopt their terminology does not advance their real goal of software freedom.