If a bloodthirsty race declares war and then switches to a none treaty and then declares war again against the same opponent do they get -100 bonus everytime?
Ah, I see you can't cancel a declaration of war like you can a partnership - but no you if I read the data files correctly there is no penalty for a Non Aggression.
I wonder if it possible to MOD the treaties so that WAR is viewed as a cancelable treaty type by the computer - thus allowing you to end a war without signing a treaty....