User blog comment:Thomperfan/My honest thoughts on Brawl in the Family/@comment-26302585-20170820163300

You know something else? The sister fight protocol was never in episodes before this. As we all know Lincoln helped Lynn and Lucy with their problems in "Space Invader", but where was the sister fight protocol then? The times Lola and Lana argued, where was the sister sight protocol? And it never appears again. I think the protocol had no reason to exist, other than for this episode to happen and fo the characters act like idiots, and the parents to be useless.