If your really fed up with laws, than try to lure your battles in "Jagd" places like Jagd Dorsa and Jagd Ahli. For example, say you had a mission that required you to defeat another clan (missions with the blue devil-like head logo), you could try to make them go to Jagd places where there is no laws. But make sure they go there plus you meeting them in the limited days for the mission(unless its an "unlimited days" mission). Now you can battle without worrying about getting yellow or even red cards!