Change your Tame Detection to use OwnableEntity.

	UUID getTamer(Entity e){
		if(e instanceof OwnableEntity tameable)
			return tameable.isTame() ? tameable.getOwnerUUID() : null;
		else {
            if(e instanceof Fox fox)
                return FOX_TRUSTED_UUID_SECONDARY != null ? fox.getEntityData().get(FOX_TRUSTED_UUID_SECONDARY).orElse(null) : null;
        }
		return null;
	}

As well as add a Blacklist tag for Mobs to be stopped from Spawning inside claims! That would be very useful.

I would PR this, but you say you aren't accepting them so ill just suggest the updates. I don't care if you change your License, i just want this to be better :)

Thanks for the feedback.
I think I'll improve entity owner checks in more ways than one. I noticed that it works somewhat differently depending on whether the owned entity is interacting with something or being interacted with. I'll include a check for OwnableEntity as well.
I'll consider adding exception configuration for mob spawn protection. #364