@Ozy1 You are making this more difficult and more extreme than it needs to be. If having players opted in for wars and not using flags is a problem with you, COMMUNICATE with them! That’s what a leader does. Ask them why they aren’t using their flags. If they don’t want to do wars, say, “OK, cool. Please opt out so your team doesn’t count in matching. Do you know how to do that, or do you need me to talk you through it?”
If you aren’t willing to communicate with them, you aren’t going to be an effective leader.