Not that anyone except Garp and Sengoku knew at the time. That would have actually been useful information on the bounty poster. [Not because Smoker cares who Luffy's related to, just when they get in his way. And a little forewarning about the most wanted man in the world showing up in the middle of nowhere seriously would have been nice.]
[voice] I feel your pain. The final part with Dragon and Sabo is REALLY unclear
Not that anyone except Garp and Sengoku knew at the time. That would have actually been useful information on the bounty poster. [Not because Smoker cares who Luffy's related to, just when they get in his way. And a little forewarning about the most wanted man in the world showing up in the middle of nowhere seriously would have been nice.]