Having it upright represents therefore peace, and having it upside down represents war. When a nation (or group) goes to war that uses this flag (somewhere), it should reverse this flag. That signals to everyone that the nation/group is at war, and would involve more people in the decision making about war and peace. This more intense scrutiny can both ratify a war locally, and the flag in the hands of individuals supports a convenient method of democratic voting about what the war/peace status should be according to the person having that flag. People that turn their flag upside down favor war, others favor peace. One flag for war and peace: cost effective!

When a nation wages war under a banner of peace (upright flag), they are signaling that their war does apparently not bear public scrutiny either of the world or the population, since they tried not to incite such public scrutiny by pretending to be at peace. Obviously the concerning leaders will have some excuse about this, but if they hide their actual status, this could be used against them in a future court where they may face charges for war crimes, such as waging secret and therefore not ratified war in breach with their social contract and the expectations of the local and world People. Lying and "secret government" would be one of the worst type of offenses possible for leaders, an act of war against the local people and the people of the world, probably the worst crime against democracy possible.