Don’t waste your time with this person. They’re only interested in giving smug ethics lessons that don’t even apply to the situation. Maybe it makes them feel superior to everyone? Who knows, but it’s a waste of time either way.
Why isn’t it an option in this hypothetical? Is there a gun to my head?
I guess I’d either try to spoil my ballot, or just sit there with the pen in my hand until they either shoot me or leave me alone.