For clarification, here’s a re-enactment of the Problematic Pacifist. Assume that the Problematic Pacifist has much higher stats than the MacGuffin Holder, making it so the MacGuffin Holder can’t get around the Problematic Pacifist without engaging in combat.
MacGuffin Holder: It’s time for me to bring the MacGuffin to the danger pit.
Problematic Pacifist: That’s a bad idea. You should take it to the safety pit where my faction wants it to be.
MH: I’ve been vocal about my plans to do this for the past week.
PP: And my protests have gone ignored.
MH: If you have a problem with it, meet me at the danger pit and try to take it from me.
PP: I’ll meet you there, but I won’t fight you.
MH: I’m not giving it up without a fight.
PP: Too late, I’m already here and standing in your way.
MH: Move.
PP: No.
MH: sighs, attacks
PP: Now you can all see how much of a bloodthirsty villain MH is!
MH: (Having to fight a rival who isn’t fighting back just so you can use it against my character isn’t fun.)
PP: (I’m sorry but I’m just playing my character.)
MH: keeps going just to get this plot point resolved
PP: gets KOed, recovers later
MH: The deed is done. The MacGuffin has exploded.
PP: Sure, you feel proud now, but how many innocent people who weren’t fighting back did you enjoy stabbing at the danger pit?
MH: goes to Storytellers to get this behavior to stop
In this way, the Problematic Pacifist is able to weaponize their pacifism against their rivals and generally bring the mood of the game down by holding those forced situations against the person who attacked them.