Everyone raised by Garp has gone against the world government.
So everyone raised or mentored by garp has gone against the world government. 1. Dragon- revolutionary 2. Kuzan- Pirate 3. Ace- Pirate 4. Luffy- Pirate 5. Koby- Navy??
I mean Koby is already half way there because he is a SWORD member. So maybe in the future he might become much more against the world government.