|Is this the face of a Shichibukai?|
- Luffy is Dragon's son and therefore the World Government would not allow someone like that to be in their midst.
- Luffy has already made an enemy of the WG on his own even beyond just the normal pirate ways. For fucks sake he burnt the WG flag and thus denoted declaring WAR on them.
- The WG wants him dead especially since the Celestial Dragon incident. No way would they let him off the hook even if Sengoku did.
- Luffy hates the WG for what they did in killing Ace. He would not work for them not in the slightest.
- Luffy also has detest for them because of what they did to Nico Robin.
- Luffy wants to be free at all costs, therefore being the "DOG" of the WG would not be anything he would ever consider.
- Since Robin was amused by the "event" there is no way he would be a Shichibukai, because she probably hates the WG more so than Luffy.