I have to favor the other side a little here. People seem to think adventurers can roam the continent all willy nilly. Such is not the case. Adventurers belong to realms.
I agree with this so much. When I was playing a Judge, the best way to inspire me to execute an advy was if I noticed they had betrayed their realm just to join their noble character's realm, the advy presumably used as a tool of their noble.