User blog comment:Fist of fire/between a rock and a hard place/@comment-1940096-20120624202353/@comment-1940096-20120625022549

Everybody who mattered would have known they considered each other family. In fact it was flat out stated by Sengoku when Luffy got there so the civilians would have known anyway. Like I already said the message they would have learned was that family is the most important thing.