Your post doesn't quite parse for me; while I am fairly conversant in political philosophy I'm having trouble connecting "philosophy of liberty" to anything the FSF does.

My annoyance is simpler, though: I dislike propaganda. That the FSF seeks to re-define the word to the exclusion of all else is bothersome, much as, for another example, the American Republican Party seeks to redefine "socialist" to mean "center-right". It's the poor debate tactic of the extremist who can't accept the validity of opposing positions.