Morality is not subjective? Can you explain how one determines, in an objective way, whether or not an act is moral? Is there a fundamental theorem of morality that I am unaware of?
FYI, objective morality doesn't require knowledge of moral axioms for people to observe particular instances of morally objective facts. Just as we don't need to know quantum physics to observe physical facts.
Anyways, if morality isn't objective, why get offended when someone insists that it is? He isn't doing anything immoral...
But other people clearly have a different opinion of what constitutes force. So we're back to the beginning. I would suggest using a different word, since your definition of "force" very much bends the standard English meaning. In particular, it's hard to use the verb form in regards to piracy: nobody is "forcing" anyone to do anything.
Edit: the physical meaning of force ("I forced the lock") doesn't really apply either...